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Posted to issues-all@impala.apache.org by "Joe McDonnell (Jira)" <ji...@apache.org> on 2023/05/31 21:06:00 UTC
[jira] [Created] (IMPALA-12175) Reduce debug info for bit-packing.cc to speed up compiling
Joe McDonnell created IMPALA-12175:
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Summary: Reduce debug info for bit-packing.cc to speed up compiling
Key: IMPALA-12175
URL: https://issues.apache.org/jira/browse/IMPALA-12175
Project: IMPALA
Issue Type: Improvement
Components: Backend
Affects Versions: Impala 4.3.0
Reporter: Joe McDonnell
be/src/util/bit-packing.cc creates a large number of variants. The object file is enormous and takes a long time to assemble:
{noformat}
$ du -sh be/src/util/CMakeFiles/Util.dir/bit-packing.cc.o
223M be/src/util/CMakeFiles/Util.dir/bit-packing.cc.o{noformat}
This is due to debug information. Setting -g1 for this file reduces the size dramatically:
{noformat}
$ du -sh be/src/util/CMakeFiles/Util.dir/bit-packing.cc.o
25M be/src/util/CMakeFiles/Util.dir/bit-packing.cc.o{noformat}
I don't think this debug information is very useful for us, because we almost never step through or examine the variables for these functions. Limiting debug info to -g1 (which is enough for stack traces) might be worth it.
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