GH-43254: [C++] Always prefer mimalloc to jemalloc

cpp/src/arrow/memory_pool.cc

@@ -85,19 +85,17 @@ struct SupportedBackend {
 
 const std::vector<SupportedBackend>& SupportedBackends() {
   static std::vector<SupportedBackend> backends = {
-  // ARROW-12316: Apple => mimalloc first, then jemalloc
-  //              non-Apple => jemalloc first, then mimalloc
-#if defined(ARROW_JEMALLOC) && !defined(__APPLE__)
-    {"jemalloc", MemoryPoolBackend::Jemalloc},
-#endif
+  // mimalloc is our preferred allocator for several reasons:
+  // 1) it has good performance
+  // 2) it is well-supported on all our main platforms (Linux, macOS, Windows)
+  // 3) it is easy to configure and has a consistent API.
 #ifdef ARROW_MIMALLOC
-    {"mimalloc", MemoryPoolBackend::Mimalloc},
+      {"mimalloc", MemoryPoolBackend::Mimalloc},
 #endif
-#if defined(ARROW_JEMALLOC) && defined(__APPLE__)
-    {"jemalloc", MemoryPoolBackend::Jemalloc},
+#ifdef ARROW_JEMALLOC
+      {"jemalloc", MemoryPoolBackend::Jemalloc},
 #endif
-    {"system", MemoryPoolBackend::System}
-  };
+      {"system", MemoryPoolBackend::System}};
   return backends;
 }
 

dev/archery/archery/benchmark/runner.py

@@ -123,6 +123,8 @@ def default_configuration(**kwargs):
             with_csv=True,
             with_dataset=True,
             with_json=True,
+            with_jemalloc=True,
+            with_mimalloc=True,
             with_parquet=True,
             with_python=False,
             with_brotli=True,

dev/tasks/linux-packages/github.linux.yml

@@ -64,7 +64,7 @@ jobs:
         run: |
           set -e
           pushd arrow/dev/tasks/linux-packages
-          rake version:update
+          rake version:update ARROW_RELEASE_TIME="$(date --iso-8601=seconds)"
           rake docker:pull || :
           rake --trace {{ task_namespace }}:build BUILD_DIR=build
           popd

docs/source/cpp/memory.rst

@@ -139,9 +139,9 @@ Default Memory Pool
 
 The default memory pool depends on how Arrow C++ was compiled:
 
-- if enabled at compile time, a `jemalloc <http://jemalloc.net/>`_ heap;
-- otherwise, if enabled at compile time, a
-  `mimalloc <https://github.com/microsoft/mimalloc>`_ heap;
+- if enabled at compile time, a `mimalloc <https://github.com/microsoft/mimalloc>`_
+  heap;
+- otherwise, if enabled at compile time, a `jemalloc <http://jemalloc.net/>`_ heap;
 - otherwise, the C library ``malloc`` heap.
 
 Overriding the Default Memory Pool

docs/source/python/memory.rst

@@ -110,12 +110,12 @@ the buffer is garbage-collected, all of the memory is freed:
    pa.total_allocated_bytes()
 
 Besides the default built-in memory pool, there may be additional memory pools
-to choose (such as `mimalloc <https://github.com/microsoft/mimalloc>`_)
-from depending on how Arrow was built.  One can get the backend
-name for a memory pool::
+to choose from (such as `jemalloc <http://jemalloc.net/>`_)
+depending on how Arrow was built.  One can get the backend name for a memory
+pool::
 
    >>> pa.default_memory_pool().backend_name
-   'jemalloc'
+   'mimalloc'
 
 .. seealso::
    :ref:`API documentation for memory pools <api.memory_pool>`.