Zoltan Borok-Nagy has posted comments on this change. ( http://gerrit.cloudera.org:8080/17389 )
Change subject: IMPALA-10680: Replace StringToFloatInternal using fast_double_parser library ...................................................................... Patch Set 6: (1 comment) http://gerrit.cloudera.org:8080/#/c/17389/6/be/src/util/string-parser.h File be/src/util/string-parser.h: http://gerrit.cloudera.org:8080/#/c/17389/6/be/src/util/string-parser.h@545 PS6, Line 545: std::string res; > I had checked Small String Optimization and had read till 24 bytes it would Yeah, I think it'd be good to see measurements for longer float literals. We are using TCMalloc in Impala which should be fairly performant so it's possible that the perf is not too bad. We can also have an 'if' in the code. If strlen > 1 KiB use strtod(), otherwise use fast_double_parser with a Variable-length array, or a fixed-sized 1 KiB array? -- To view, visit http://gerrit.cloudera.org:8080/17389 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-MessageType: comment Gerrit-Change-Id: Ic105ad38a2fcbf2fb4e8ae8af6d9a8e251a9c141 Gerrit-Change-Number: 17389 Gerrit-PatchSet: 6 Gerrit-Owner: Amogh Margoor <amarg...@gmail.com> Gerrit-Reviewer: Amogh Margoor <amarg...@gmail.com> Gerrit-Reviewer: Csaba Ringhofer <csringho...@cloudera.com> Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com> Gerrit-Reviewer: Qifan Chen <qc...@cloudera.com> Gerrit-Reviewer: Zoltan Borok-Nagy <borokna...@cloudera.com> Gerrit-Comment-Date: Fri, 21 May 2021 11:24:06 +0000 Gerrit-HasComments: Yes
