[ARROW-7785] [C++] sparse_tensor.cc is extremely slow to compile

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.17.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/24019
• Assignee: Kenta Murata
• Reporter: Antoine Pitrou
• Created: 06/Feb/20 16:23
• Updated: 11/Jan/23 07:56
• Resolved: 07/Mar/20 14:23

Description

This comes up especially when doing an optimized build. sparse_tensor.cc is always enabled even if all components are disabled, and it takes multiple seconds to compile.

Using CLangBuildAnalyzer I get the following results:

**** Files that took longest to codegen (compiler backend):
 66372 ms: build-clang-profile/src/arrow/CMakeFiles/arrow_objlib.dir/sparse_tensor.cc.o
 16457 ms: build-clang-profile/src/arrow/CMakeFiles/arrow_objlib.dir/array/diff.cc.o
  6283 ms: build-clang-profile/src/arrow/CMakeFiles/arrow_objlib.dir/scalar.cc.o
  5284 ms: build-clang-profile/src/arrow/CMakeFiles/arrow_objlib.dir/builder.cc.o
  5090 ms: build-clang-profile/src/arrow/CMakeFiles/arrow_objlib.dir/array/dict_internal.cc.o

Issue Links

• links to: GitHub Pull Request #6533