kou commented on code in PR #45210:
URL: https://github.com/apache/arrow/pull/45210#discussion_r1909712125
##########
cpp/CMakePresets.json:
##########
@@ -6,6 +6,30 @@
"patch": 0
},
"configurePresets": [
+ {
+ "name": "_allocator-none",
+ "hidden": true,
+ "cacheVariables": {
+ "ARROW_JEMALLOC": "OFF",
+ "ARROW_MIMALLOC": "OFF"
+ }
+ },
+ {
+ "name": "_allocator-jemalloc",
+ "hidden": true,
+ "cacheVariables": {
+ "ARROW_JEMALLOC": "ON",
+ "ARROW_MIMALLOC": "OFF"
Review Comment:
We can enable multiple allocators at the same time. :-)
The default allocator is chosen based on our recommendation:
https://github.com/apache/arrow/blob/5181c24f6d780591426e0af0d1b72c68f190484c/cpp/src/arrow/memory_pool.cc#L143
https://github.com/apache/arrow/blob/5181c24f6d780591426e0af0d1b72c68f190484c/cpp/src/arrow/memory_pool.cc#L86-L100
But users can select any allocator from enabled allocators by creating
`arrow::MemoryPool` instead of using `arrow::default_memory_pool()`.
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