diff --git a/.github/workflows/codesee-arch-diagram.yml b/.github/workflows/codesee-arch-diagram.yml
new file mode 100644
index 0000000..80f58e6
--- /dev/null
+++ b/.github/workflows/codesee-arch-diagram.yml
@@ -0,0 +1,23 @@
+# This workflow was added by CodeSee. Learn more at https://codesee.io/
+# This is v2.0 of this workflow file
+on:
+  push:
+    branches:
+      - staging
+  pull_request_target:
+    types: [opened, synchronize, reopened]
+
+name: CodeSee
+
+permissions: read-all
+
+jobs:
+  codesee:
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    name: Analyze the repo with CodeSee
+    steps:
+      - uses: Codesee-io/codesee-action@v2
+        with:
+          codesee-token: ${{ secrets.CODESEE_ARCH_DIAG_API_TOKEN }}
+          codesee-url: https://app.codesee.io
diff --git a/benches/index.ts b/benches/index.ts
new file mode 100644
index 0000000..1316bb8
--- /dev/null
+++ b/benches/index.ts
@@ -0,0 +1,47 @@
+#!/usr/bin/env ts-node
+
+import fs from 'fs';
+import path from 'path';
+import si from 'systeminformation';
+import tableNotIndexed from './table_not_indexed';
+import tableIndexed from './table_indexed';
+import tableDerived from './table_derived';
+
+async function main(): Promise<void> {
+  await fs.promises.mkdir(path.join(__dirname, 'results'), { recursive: true });
+  await tableNotIndexed();
+  await tableIndexed();
+  await tableDerived();
+  const resultFilenames = await fs.promises.readdir(
+    path.join(__dirname, 'results'),
+  );
+  const metricsFile = await fs.promises.open(
+    path.join(__dirname, 'results', 'metrics.txt'),
+    'w',
+  );
+  let concatenating = false;
+  for (const resultFilename of resultFilenames) {
+    if (/.+_metrics\.txt$/.test(resultFilename)) {
+      const metricsData = await fs.promises.readFile(
+        path.join(__dirname, 'results', resultFilename),
+      );
+      if (concatenating) {
+        await metricsFile.write('\n');
+      }
+      await metricsFile.write(metricsData);
+      concatenating = true;
+    }
+  }
+  await metricsFile.close();
+  const systemData = await si.get({
+    cpu: '*',
+    osInfo: 'platform, distro, release, kernel, arch',
+    system: 'model, manufacturer',
+  });
+  await fs.promises.writeFile(
+    path.join(__dirname, 'results', 'system.json'),
+    JSON.stringify(systemData, null, 2),
+  );
+}
+
+void main();
diff --git a/benches/results/metrics.txt b/benches/results/metrics.txt
new file mode 100644
index 0000000..e69de29
diff --git a/benches/results/system.json b/benches/results/system.json
new file mode 100644
index 0000000..d0a34e7
--- /dev/null
+++ b/benches/results/system.json
@@ -0,0 +1,41 @@
+{
+  "cpu": {
+    "manufacturer": "AMD",
+    "brand": "Ryzen 7 2700X Eight-Core Processor",
+    "vendor": "AMD",
+    "family": "23",
+    "model": "8",
+    "stepping": "2",
+    "revision": "",
+    "voltage": "",
+    "speed": 3.7,
+    "speedMin": 2.2,
+    "speedMax": 3.7,
+    "governor": "performance",
+    "cores": 16,
+    "physicalCores": 8,
+    "performanceCores": 8,
+    "efficiencyCores": 0,
+    "processors": 1,
+    "socket": "",
+    "flags": "fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb hw_pstate ssbd ibpb vmmcall fsgsbase bmi1 avx2 smep bmi2 rdseed adx smap clflushopt sha_ni xsaveopt xsavec xgetbv1 clzero irperf xsaveerptr arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif overflow_recov succor smca sev sev_es",
+    "virtualization": true,
+    "cache": {
+      "l1d": 262144,
+      "l1i": 524288,
+      "l2": 4194304,
+      "l3": 16777216
+    }
+  },
+  "osInfo": {
+    "platform": "linux",
+    "distro": "nixos",
+    "release": "22.11",
+    "kernel": "6.1.23",
+    "arch": "x64"
+  },
+  "system": {
+    "model": "System Product Name",
+    "manufacturer": "System manufacturer"
+  }
+}
\ No newline at end of file
diff --git a/benches/table_derived.ts b/benches/table_derived.ts
new file mode 100644
index 0000000..f21136b
--- /dev/null
+++ b/benches/table_derived.ts
@@ -0,0 +1,41 @@
+import path from 'path';
+import b from 'benny';
+import Table from '@';
+import { suiteCommon } from './utils';
+
+async function main() {
+  const summary = await b.suite(
+    path.basename(__filename, path.extname(__filename)),
+    b.add('insert', () => {
+      const t = new Table(['a', 'b', 'c', 'd'], [['a', 'b', 'c', 'd']]);
+      return () => {
+        t.insertRow({ a: 1, b: 2, c: 3, d: 4 });
+      };
+    }),
+    b.add('delete row', () => {
+      const t = new Table(['a', 'b', 'c', 'd'], [['a', 'b', 'c', 'd']]);
+      const rI = t.insertRow({ a: 1, b: 2, c: 3, d: 4 });
+      return () => {
+        t.deleteRow(rI);
+      };
+    }),
+    b.add('get where rows - 100', () => {
+      const t = new Table(['a', 'b', 'c', 'd'], [['a', 'b', 'c', 'd']]);
+      for (let i = 0; i < 100; i++) {
+        t.insertRow({ a: 1, b: 2, c: 3, d: 4 });
+      }
+      return () => {
+        const rIs = t.whereRows(['a', 'b', 'c', 'd'], [1, 2, 3, 4]);
+        rIs.map((rI) => t.getRow(rI));
+      };
+    }),
+    ...suiteCommon,
+  );
+  return summary;
+}
+
+if (require.main === module) {
+  void main();
+}
+
+export default main;
diff --git a/benches/table_indexed.ts b/benches/table_indexed.ts
new file mode 100644
index 0000000..e7faf4a
--- /dev/null
+++ b/benches/table_indexed.ts
@@ -0,0 +1,41 @@
+import path from 'path';
+import b from 'benny';
+import Table from '@';
+import { suiteCommon } from './utils';
+
+async function main() {
+  const summary = await b.suite(
+    path.basename(__filename, path.extname(__filename)),
+    b.add('insert', () => {
+      const t = new Table(['a', 'b', 'c', 'd'], ['a', 'b', 'c', 'd']);
+      return () => {
+        t.insertRow({ a: 1, b: 2, c: 3, d: 4 });
+      };
+    }),
+    b.add('delete row', () => {
+      const t = new Table(['a', 'b', 'c', 'd'], ['a', 'b', 'c', 'd']);
+      const rI = t.insertRow({ a: 1, b: 2, c: 3, d: 4 });
+      return () => {
+        t.deleteRow(rI);
+      };
+    }),
+    b.add('get where rows - 100', () => {
+      const t = new Table(['a', 'b', 'c', 'd'], ['a', 'b', 'c', 'd']);
+      for (let i = 0; i < 100; i++) {
+        t.insertRow({ a: 1, b: 2, c: 3, d: 4 });
+      }
+      return () => {
+        const rIs = t.whereRows('a', 1);
+        rIs.map((rI) => t.getRow(rI));
+      };
+    }),
+    ...suiteCommon,
+  );
+  return summary;
+}
+
+if (require.main === module) {
+  void main();
+}
+
+export default main;
diff --git a/benches/table_not_indexed.ts b/benches/table_not_indexed.ts
new file mode 100644
index 0000000..7d012df
--- /dev/null
+++ b/benches/table_not_indexed.ts
@@ -0,0 +1,41 @@
+import path from 'path';
+import b from 'benny';
+import Table from '@';
+import { suiteCommon } from './utils';
+
+async function main() {
+  const summary = await b.suite(
+    path.basename(__filename, path.extname(__filename)),
+    b.add('insert row', () => {
+      const t = new Table(['a', 'b', 'c', 'd']);
+      return () => {
+        t.insertRow({ a: 1, b: 2, c: 3, d: 4 });
+      };
+    }),
+    b.add('delete row', () => {
+      const t = new Table(['a', 'b', 'c', 'd']);
+      const rI = t.insertRow({ a: 1, b: 2, c: 3, d: 4 });
+      return () => {
+        t.deleteRow(rI);
+      };
+    }),
+    b.add('get where rows - 100', () => {
+      const t = new Table(['a', 'b', 'c', 'd']);
+      for (let i = 0; i < 100; i++) {
+        t.insertRow({ a: 1, b: 2, c: 3, d: 4 });
+      }
+      return () => {
+        const rIs = t.whereRows('a', 1, true);
+        rIs.map((rI) => t.getRow(rI));
+      };
+    }),
+    ...suiteCommon,
+  );
+  return summary;
+}
+
+if (require.main === module) {
+  void main();
+}
+
+export default main;
diff --git a/benches/utils.ts b/benches/utils.ts
new file mode 100644
index 0000000..f3d4d95
--- /dev/null
+++ b/benches/utils.ts
@@ -0,0 +1,61 @@
+import fs from 'fs';
+import path from 'path';
+import b from 'benny';
+import { codeBlock } from 'common-tags';
+import packageJson from '../package.json';
+
+const suiteCommon = [
+  b.cycle(),
+  b.complete(),
+  b.save({
+    file: (summary) => summary.name,
+    folder: path.join(__dirname, '../results'),
+    version: packageJson.version,
+    details: true,
+  }),
+  b.save({
+    file: (summary) => summary.name,
+    folder: path.join(__dirname, '../results'),
+    version: packageJson.version,
+    format: 'chart.html',
+  }),
+  b.complete((summary) => {
+    const filePath = path.join(
+      __dirname,
+      '../results',
+      summary.name + '_metrics.txt',
+    );
+    fs.writeFileSync(
+      filePath,
+      codeBlock`
+      # TYPE ${summary.name}_ops gauge
+      ${summary.results
+        .map(
+          (result) =>
+            `${summary.name}_ops{name="${result.name}"} ${result.ops}`,
+        )
+        .join('\n')}
+
+      # TYPE ${summary.name}_margin gauge
+      ${summary.results
+        .map(
+          (result) =>
+            `${summary.name}_margin{name="${result.name}"} ${result.margin}`,
+        )
+        .join('\n')}
+
+      # TYPE ${summary.name}_samples counter
+      ${summary.results
+        .map(
+          (result) =>
+            `${summary.name}_samples{name="${result.name}"} ${result.samples}`,
+        )
+        .join('\n')}
+      ` + '\n',
+    );
+    // eslint-disable-next-line no-console
+    console.log('\nSaved to:', path.resolve(filePath));
+  }),
+];
+
+export { suiteCommon };
diff --git a/package-lock.json b/package-lock.json
index 68e27f2..0a6e6ca 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19,6 +19,8 @@
         "@types/node": "^18.15.0",
         "@typescript-eslint/eslint-plugin": "^5.45.1",
         "@typescript-eslint/parser": "^5.45.1",
+        "benny": "^3.7.1",
+        "common-tags": "^1.8.2",
         "eslint": "^8.15.0",
         "eslint-config-prettier": "^8.5.0",
         "eslint-plugin-import": "^2.26.0",
@@ -29,6 +31,7 @@
         "jest-junit": "^14.0.0",
         "prettier": "^2.6.2",
         "shx": "^0.3.4",
+        "systeminformation": "^5.18.5",
         "ts-jest": "^28.0.5",
         "ts-node": "^10.9.1",
         "tsconfig-paths": "^3.9.0",
@@ -49,6 +52,48 @@
         "node": ">=6.0.0"
       }
     },
+    "node_modules/@arrows/array": {
+      "version": "1.4.1",
+      "resolved": "https://registry.npmjs.org/@arrows/array/-/array-1.4.1.tgz",
+      "integrity": "sha512-MGYS8xi3c4tTy1ivhrVntFvufoNzje0PchjEz6G/SsWRgUKxL4tKwS6iPdO8vsaJYldagAeWMd5KRD0aX3Q39g==",
+      "dev": true,
+      "dependencies": {
+        "@arrows/composition": "^1.2.2"
+      }
+    },
+    "node_modules/@arrows/composition": {
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/@arrows/composition/-/composition-1.2.2.tgz",
+      "integrity": "sha512-9fh1yHwrx32lundiB3SlZ/VwuStPB4QakPsSLrGJFH6rCXvdrd060ivAZ7/2vlqPnEjBkPRRXOcG1YOu19p2GQ==",
+      "dev": true
+    },
+    "node_modules/@arrows/dispatch": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/@arrows/dispatch/-/dispatch-1.0.3.tgz",
+      "integrity": "sha512-v/HwvrFonitYZM2PmBlAlCqVqxrkIIoiEuy5bQgn0BdfvlL0ooSBzcPzTMrtzY8eYktPyYcHg8fLbSgyybXEqw==",
+      "dev": true,
+      "dependencies": {
+        "@arrows/composition": "^1.2.2"
+      }
+    },
+    "node_modules/@arrows/error": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/@arrows/error/-/error-1.0.2.tgz",
+      "integrity": "sha512-yvkiv1ay4Z3+Z6oQsUkedsQm5aFdyPpkBUQs8vejazU/RmANABx6bMMcBPPHI4aW43VPQmXFfBzr/4FExwWTEA==",
+      "dev": true
+    },
+    "node_modules/@arrows/multimethod": {
+      "version": "1.4.1",
+      "resolved": "https://registry.npmjs.org/@arrows/multimethod/-/multimethod-1.4.1.tgz",
+      "integrity": "sha512-AZnAay0dgPnCJxn3We5uKiB88VL+1ZIF2SjZohLj6vqY2UyvB/sKdDnFP+LZNVsTC5lcnGPmLlRRkAh4sXkXsQ==",
+      "dev": true,
+      "dependencies": {
+        "@arrows/array": "^1.4.1",
+        "@arrows/composition": "^1.2.2",
+        "@arrows/error": "^1.0.2",
+        "fast-deep-equal": "^3.1.3"
+      }
+    },
     "node_modules/@babel/code-frame": {
       "version": "7.18.6",
       "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.18.6.tgz",
@@ -2013,6 +2058,15 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/astral-regex": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/astral-regex/-/astral-regex-2.0.0.tgz",
+      "integrity": "sha512-Z7tMw1ytTXt5jqMcOP+OQteU1VuNK9Y02uuJtKQ1Sv69jXQKKg5cibLwGJow8yzZP+eAc18EmLGPal0bp36rvQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/babel-jest": {
       "version": "28.1.3",
       "resolved": "https://registry.npmjs.org/babel-jest/-/babel-jest-28.1.3.tgz",
@@ -2119,6 +2173,45 @@
       "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==",
       "dev": true
     },
+    "node_modules/benchmark": {
+      "version": "2.1.4",
+      "resolved": "https://registry.npmjs.org/benchmark/-/benchmark-2.1.4.tgz",
+      "integrity": "sha512-l9MlfN4M1K/H2fbhfMy3B7vJd6AGKJVQn2h6Sg/Yx+KckoUA7ewS5Vv6TjSq18ooE1kS9hhAlQRH3AkXIh/aOQ==",
+      "dev": true,
+      "dependencies": {
+        "lodash": "^4.17.4",
+        "platform": "^1.3.3"
+      }
+    },
+    "node_modules/benny": {
+      "version": "3.7.1",
+      "resolved": "https://registry.npmjs.org/benny/-/benny-3.7.1.tgz",
+      "integrity": "sha512-USzYxODdVfOS7JuQq/L0naxB788dWCiUgUTxvN+WLPt/JfcDURNNj8kN/N+uK6PDvuR67/9/55cVKGPleFQINA==",
+      "dev": true,
+      "dependencies": {
+        "@arrows/composition": "^1.0.0",
+        "@arrows/dispatch": "^1.0.2",
+        "@arrows/multimethod": "^1.1.6",
+        "benchmark": "^2.1.4",
+        "common-tags": "^1.8.0",
+        "fs-extra": "^10.0.0",
+        "json2csv": "^5.0.6",
+        "kleur": "^4.1.4",
+        "log-update": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/benny/node_modules/kleur": {
+      "version": "4.1.5",
+      "resolved": "https://registry.npmjs.org/kleur/-/kleur-4.1.5.tgz",
+      "integrity": "sha512-o+NO+8WrRiQEE4/7nwRJhN1HWpVmJm511pBHUxPLtp0BUISzlBplORYSmTclCnJvQq2tKu/sgl3xVpkc7ZWuQQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/bitset": {
       "version": "5.1.1",
       "resolved": "https://registry.npmjs.org/bitset/-/bitset-5.1.1.tgz",
@@ -2288,6 +2381,18 @@
       "integrity": "sha512-cOU9usZw8/dXIXKtwa8pM0OTJQuJkxMN6w30csNRUerHfeQ5R6U3kkU/FtJeIf3M202OHfY2U8ccInBG7/xogA==",
       "dev": true
     },
+    "node_modules/cli-cursor": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/cli-cursor/-/cli-cursor-3.1.0.tgz",
+      "integrity": "sha512-I/zHAwsKf9FqGoXM4WWRACob9+SNukZTd94DWF57E4toouRulbCxcUh6RKUEOQlYTHJnzkPMySvPNaaSLNfLZw==",
+      "dev": true,
+      "dependencies": {
+        "restore-cursor": "^3.1.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/cliui": {
       "version": "7.0.4",
       "resolved": "https://registry.npmjs.org/cliui/-/cliui-7.0.4.tgz",
@@ -2333,6 +2438,24 @@
       "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
       "dev": true
     },
+    "node_modules/commander": {
+      "version": "6.2.1",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-6.2.1.tgz",
+      "integrity": "sha512-U7VdrJFnJgo4xjrHpTzu0yrHPGImdsmD95ZlgYSEajAn2JKzDhDTPG9kBTefmObL2w/ngeZnilk+OV9CG3d7UA==",
+      "dev": true,
+      "engines": {
+        "node": ">= 6"
+      }
+    },
+    "node_modules/common-tags": {
+      "version": "1.8.2",
+      "resolved": "https://registry.npmjs.org/common-tags/-/common-tags-1.8.2.tgz",
+      "integrity": "sha512-gk/Z852D2Wtb//0I+kRFNKKE9dIIVirjoqPoA1wJU+XePVXZfGeBpk45+A1rKO4Q43prqWBNY/MiIeRLbPWUaA==",
+      "dev": true,
+      "engines": {
+        "node": ">=4.0.0"
+      }
+    },
     "node_modules/concat-map": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
@@ -3130,6 +3253,20 @@
       "integrity": "sha512-WIWGi2L3DyTUvUrwRKgGi9TwxQMUEqPOPQBVi71R96jZXJdFskXEmf54BoZaS1kknGODoIGASGEzBUYdyMCBJg==",
       "dev": true
     },
+    "node_modules/fs-extra": {
+      "version": "10.1.0",
+      "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-10.1.0.tgz",
+      "integrity": "sha512-oRXApq54ETRj4eMiFzGnHWGy+zo5raudjuxN0b8H7s/RU2oW0Wvsx9O0ACRN/kRq9E8Vu/ReskGB5o3ji+FzHQ==",
+      "dev": true,
+      "dependencies": {
+        "graceful-fs": "^4.2.0",
+        "jsonfile": "^6.0.1",
+        "universalify": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
     "node_modules/fs.realpath": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
@@ -4571,6 +4708,25 @@
       "integrity": "sha1-nbe1lJatPzz+8wp1FC0tkwrXJlE=",
       "dev": true
     },
+    "node_modules/json2csv": {
+      "version": "5.0.7",
+      "resolved": "https://registry.npmjs.org/json2csv/-/json2csv-5.0.7.tgz",
+      "integrity": "sha512-YRZbUnyaJZLZUJSRi2G/MqahCyRv9n/ds+4oIetjDF3jWQA7AG7iSeKTiZiCNqtMZM7HDyt0e/W6lEnoGEmMGA==",
+      "deprecated": "Package no longer supported. Contact Support at https://www.npmjs.com/support for more info.",
+      "dev": true,
+      "dependencies": {
+        "commander": "^6.1.0",
+        "jsonparse": "^1.3.1",
+        "lodash.get": "^4.4.2"
+      },
+      "bin": {
+        "json2csv": "bin/json2csv.js"
+      },
+      "engines": {
+        "node": ">= 10",
+        "npm": ">= 6.13.0"
+      }
+    },
     "node_modules/json5": {
       "version": "2.2.1",
       "resolved": "https://registry.npmjs.org/json5/-/json5-2.2.1.tgz",
@@ -4589,6 +4745,27 @@
       "integrity": "sha512-gfFQZrcTc8CnKXp6Y4/CBT3fTc0OVuDofpre4aEeEpSBPV5X5v4+Vmx+8snU7RLPrNHPKSgLxGo9YuQzz20o+w==",
       "dev": true
     },
+    "node_modules/jsonfile": {
+      "version": "6.1.0",
+      "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-6.1.0.tgz",
+      "integrity": "sha512-5dgndWOriYSm5cnYaJNhalLNDKOqFwyDB/rr1E9ZsGciGvKPs8R2xYGCacuf3z6K1YKDz182fd+fY3cn3pMqXQ==",
+      "dev": true,
+      "dependencies": {
+        "universalify": "^2.0.0"
+      },
+      "optionalDependencies": {
+        "graceful-fs": "^4.1.6"
+      }
+    },
+    "node_modules/jsonparse": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/jsonparse/-/jsonparse-1.3.1.tgz",
+      "integrity": "sha512-POQXvpdL69+CluYsillJ7SUhKvytYjW9vG/GKpnf+xP8UWgYEM/RaMzHHofbALDiKbbP1W8UEYmgGl39WkPZsg==",
+      "dev": true,
+      "engines": [
+        "node >= 0.2.0"
+      ]
+    },
     "node_modules/kleur": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/kleur/-/kleur-3.0.3.tgz",
@@ -4639,6 +4816,18 @@
         "node": ">=4"
       }
     },
+    "node_modules/lodash": {
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==",
+      "dev": true
+    },
+    "node_modules/lodash.get": {
+      "version": "4.4.2",
+      "resolved": "https://registry.npmjs.org/lodash.get/-/lodash.get-4.4.2.tgz",
+      "integrity": "sha512-z+Uw/vLuy6gQe8cfaFWD7p0wVv8fJl3mbzXh33RS+0oW2wvUqiRXiQ69gLWSLpgB5/6sU+r6BlQR0MBILadqTQ==",
+      "dev": true
+    },
     "node_modules/lodash.memoize": {
       "version": "4.1.2",
       "resolved": "https://registry.npmjs.org/lodash.memoize/-/lodash.memoize-4.1.2.tgz",
@@ -4651,6 +4840,38 @@
       "integrity": "sha512-0KpjqXRVvrYyCsX1swR/XTK0va6VQkQM6MNo7PqW77ByjAhoARA8EfrP1N4+KlKj8YS0ZUCtRT/YUuhyYDujIQ==",
       "dev": true
     },
+    "node_modules/log-update": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/log-update/-/log-update-4.0.0.tgz",
+      "integrity": "sha512-9fkkDevMefjg0mmzWFBW8YkFP91OrizzkW3diF7CpG+S2EYdy4+TVfGwz1zeF8x7hCx1ovSPTOE9Ngib74qqUg==",
+      "dev": true,
+      "dependencies": {
+        "ansi-escapes": "^4.3.0",
+        "cli-cursor": "^3.1.0",
+        "slice-ansi": "^4.0.0",
+        "wrap-ansi": "^6.2.0"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/log-update/node_modules/wrap-ansi": {
+      "version": "6.2.0",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-6.2.0.tgz",
+      "integrity": "sha512-r6lPcBGxZXlIcymEu7InxDMhdW0KDxpLgoFLcguasxCaJ/SOIZwINatK9KY/tf+ZrlywOKU0UDj3ATXUBfxJXA==",
+      "dev": true,
+      "dependencies": {
+        "ansi-styles": "^4.0.0",
+        "string-width": "^4.1.0",
+        "strip-ansi": "^6.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/lru-cache": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
@@ -5146,6 +5367,12 @@
         "node": ">=8"
       }
     },
+    "node_modules/platform": {
+      "version": "1.3.6",
+      "resolved": "https://registry.npmjs.org/platform/-/platform-1.3.6.tgz",
+      "integrity": "sha512-fnWVljUchTro6RiCFvCXBbNhJc2NijN7oIQxbwsyL0buWJPG85v81ehlHI9fXrJsMNgTofEoWIQeClKpgxFLrg==",
+      "dev": true
+    },
     "node_modules/prelude-ls": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/prelude-ls/-/prelude-ls-1.2.1.tgz",
@@ -5396,6 +5623,19 @@
         "node": ">=6.4.0"
       }
     },
+    "node_modules/restore-cursor": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/restore-cursor/-/restore-cursor-3.1.0.tgz",
+      "integrity": "sha512-l+sSefzHpj5qimhFSE5a8nufZYAM3sBSVMAPtYkmC+4EH2anSGaEMXSD0izRQbu9nfyQ9y5JrVmp7E8oZrUjvA==",
+      "dev": true,
+      "dependencies": {
+        "onetime": "^5.1.0",
+        "signal-exit": "^3.0.2"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/reusify": {
       "version": "1.0.4",
       "resolved": "https://registry.npmjs.org/reusify/-/reusify-1.0.4.tgz",
@@ -5566,6 +5806,23 @@
         "node": ">=8"
       }
     },
+    "node_modules/slice-ansi": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/slice-ansi/-/slice-ansi-4.0.0.tgz",
+      "integrity": "sha512-qMCMfhY040cVHT43K9BFygqYbUPFZKHOg7K73mtTWJRb8pyP3fzf4Ixd5SzdEJQ6MRUg/WBnOLxghZtKKurENQ==",
+      "dev": true,
+      "dependencies": {
+        "ansi-styles": "^4.0.0",
+        "astral-regex": "^2.0.0",
+        "is-fullwidth-code-point": "^3.0.0"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/slice-ansi?sponsor=1"
+      }
+    },
     "node_modules/source-map": {
       "version": "0.6.1",
       "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
@@ -5746,6 +6003,32 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/systeminformation": {
+      "version": "5.18.6",
+      "resolved": "https://registry.npmjs.org/systeminformation/-/systeminformation-5.18.6.tgz",
+      "integrity": "sha512-pLXv6kjJZ1xUcVs9SrCqbQ9y0x1rgRWxBUc8/KxpOp9IRxFGFfzVK5efsxBn/KdYog4C9rPcKk+kHNIL2SB/8Q==",
+      "dev": true,
+      "os": [
+        "darwin",
+        "linux",
+        "win32",
+        "freebsd",
+        "openbsd",
+        "netbsd",
+        "sunos",
+        "android"
+      ],
+      "bin": {
+        "systeminformation": "lib/cli.js"
+      },
+      "engines": {
+        "node": ">=8.0.0"
+      },
+      "funding": {
+        "type": "Buy me a coffee",
+        "url": "https://www.buymeacoffee.com/systeminfo"
+      }
+    },
     "node_modules/terminal-link": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/terminal-link/-/terminal-link-2.1.1.tgz",
@@ -6055,6 +6338,15 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/universalify": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-2.0.0.tgz",
+      "integrity": "sha512-hAZsKq7Yy11Zu1DE0OzWjw7nnLZmJZYTDZZyEFHZdUhV8FkH5MCfoU1XMaxXovpyW5nq5scPqq0ZDP9Zyl04oQ==",
+      "dev": true,
+      "engines": {
+        "node": ">= 10.0.0"
+      }
+    },
     "node_modules/update-browserslist-db": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/update-browserslist-db/-/update-browserslist-db-1.0.5.tgz",
diff --git a/package.json b/package.json
index 306f689..44f77a3 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,8 @@
     "lint": "eslint '{src,tests,scripts,benches}/**/*.{js,ts}'",
     "lintfix": "eslint '{src,tests,scripts,benches}/**/*.{js,ts}' --fix",
     "lint-shell": "find ./src ./tests ./scripts -type f -regextype posix-extended -regex '.*\\.(sh)' -exec shellcheck {} +",
-    "docs": "shx rm -rf ./docs && typedoc --gitRevision master --tsconfig ./tsconfig.build.json --out ./docs src"
+    "docs": "shx rm -rf ./docs && typedoc --gitRevision master --tsconfig ./tsconfig.build.json --out ./docs src",
+    "bench": "shx rm -rf ./benches/results && ts-node ./benches"
   },
   "dependencies": {
     "resource-counter": "^1.2.4"
@@ -32,6 +33,8 @@
     "@types/node": "^18.15.0",
     "@typescript-eslint/eslint-plugin": "^5.45.1",
     "@typescript-eslint/parser": "^5.45.1",
+    "benny": "^3.7.1",
+    "common-tags": "^1.8.2",
     "eslint": "^8.15.0",
     "eslint-config-prettier": "^8.5.0",
     "eslint-plugin-import": "^2.26.0",
@@ -42,6 +45,7 @@
     "jest-junit": "^14.0.0",
     "prettier": "^2.6.2",
     "shx": "^0.3.4",
+    "systeminformation": "^5.18.5",
     "ts-jest": "^28.0.5",
     "ts-node": "^10.9.1",
     "tsconfig-paths": "^3.9.0",
diff --git a/src/Table.ts b/src/Table.ts
index 5a9fa8b..78cb89f 100644
--- a/src/Table.ts
+++ b/src/Table.ts
@@ -42,6 +42,7 @@ class Table<R extends Record<string, any>> {
     indexes: Array<
       | keyof R
       | [keyof R, (v: any) => any]
+      | Array<keyof R>
       | [Array<keyof R>, (...vs: Array<any>) => any]
     > = [],
   ) {
@@ -57,13 +58,32 @@ class Table<R extends Record<string, any>> {
         this.indexes[i] = {
           index: new Map(),
         };
-      } else if (Array.isArray(i) && !Array.isArray(i[0])) {
+      } else if (
+        Array.isArray(i) &&
+        typeof i[0] === 'string' &&
+        typeof i[1] === 'function'
+      ) {
         const [k, f] = i;
         this.indexes[k as string] = {
           index: new Map(),
           f,
         };
-      } else if (Array.isArray(i) && Array.isArray(i[0])) {
+      } else if (Array.isArray(i) && typeof i[0] === 'string') {
+        const kDerived = i.join('');
+        this.indexesDerived[kDerived] = {
+          index: new Map(),
+          deps: i as Array<string>,
+        };
+        for (const k of i) {
+          const kDerivedSet = (this.indexesDerivedDeps[k as string] ??=
+            new Set());
+          kDerivedSet.add(kDerived);
+        }
+      } else if (
+        Array.isArray(i) &&
+        Array.isArray(i[0]) &&
+        typeof i[1] === 'function'
+      ) {
         const [ks, f] = i;
         const kDerived = ks.join('');
         this.indexesDerived[kDerived] = {
@@ -180,10 +200,11 @@ class Table<R extends Record<string, any>> {
         throw new RangeError(`Key \`${k}\` does not exist`);
       }
       const index = this.indexes[k];
-      const v_ = index.f != null ? index.f(v) : v.toString();
       if (index != null) {
+        const v_ = index.f != null ? index.f(v) : v.toString();
         return [...(index.index.get(v_) ?? new Set())];
       } else if (search) {
+        const v_ = v.toString();
         const rIs: Array<number> = [];
         for (const [rI, r] of this.rows.entries()) {
           if (r[k] === v_) {
@@ -200,11 +221,12 @@ class Table<R extends Record<string, any>> {
       }
       const kDerived = k.join('');
       const index = this.indexesDerived[kDerived];
-      const v_ =
-        index.f != null ? index.f(...v) : v.map((v) => v.toString()).join('');
       if (index != null) {
+        const v_ =
+          index.f != null ? index.f(...v) : v.map((v) => v.toString()).join('');
         return [...(index.index.get(v_) ?? new Set())];
       } else if (search) {
+        const v_ = v.map((v) => v.toString()).join('');
         const rIs: Array<number> = [];
         for (const [rI, r] of this.rows.entries()) {
           if (k.map((k) => r[k].toString()).join('') === v_) {
diff --git a/src/index.ts b/src/index.ts
index db51cef..320a54b 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,2 +1,2 @@
-export { default as Table } from './Table';
-export * as utils from './utils';
+export { default } from './Table';
+export * from './utils';
diff --git a/tests/Table.test.ts b/tests/Table.test.ts
index 7779b55..3cff4d0 100644
--- a/tests/Table.test.ts
+++ b/tests/Table.test.ts
@@ -18,7 +18,7 @@ describe(Table.name, () => {
     expect(t.whereRows('a', 'bar')).toHaveLength(0);
   });
   test('inserting, setting, updating rows use shallow copy', () => {
-    const t = new Table<{ a: number, b: number }>(['a', 'b']);
+    const t = new Table<{ a: number; b: number }>(['a', 'b']);
     const row1 = { a: 1, b: 2 };
     const rI = t.insertRow(row1);
     row1.a = 3;
@@ -39,7 +39,7 @@ describe(Table.name, () => {
     expect(row3_.b).toBe(3);
   });
   test('get table uses shallow copy', () => {
-    const t = new Table<{ a: number, b: number }>(['a', 'b']);
+    const t = new Table<{ a: number; b: number }>(['a', 'b']);
     const table = t.getTable();
     table.set(1, { a: 3, b: 4 });
     const table_ = t.getTable();
diff --git a/tsconfig.build.json b/tsconfig.build.json
index 3c5544c..724de44 100644
--- a/tsconfig.build.json
+++ b/tsconfig.build.json
@@ -7,6 +7,7 @@
   },
   "exclude": [
     "./tests/**/*",
-    "./scripts/**/*"
+    "./scripts/**/*",
+    "./benches/**/*"
   ]
 }
diff --git a/tsconfig.json b/tsconfig.json
index a774740..907ed72 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -25,7 +25,8 @@
     "./src/**/*",
     "./src/**/*.json",
     "./tests/**/*",
-    "./scripts/**/*"
+    "./scripts/**/*",
+    "./benches/**/*"
   ],
   "ts-node": {
     "require": ["tsconfig-paths/register"],