Csaba Ringhofer has posted comments on this change. ( http://gerrit.cloudera.org:8080/11183 )
Change subject: IMPALA-7521: Speed up sub-second unix time->TimestampValue conversions ...................................................................... Patch Set 16: (4 comments) http://gerrit.cloudera.org:8080/#/c/11183/16/be/src/benchmarks/convert-timestamp-benchmark.cc File be/src/benchmarks/convert-timestamp-benchmark.cc: http://gerrit.cloudera.org:8080/#/c/11183/16/be/src/benchmarks/convert-timestamp-benchmark.cc@592 PS16, Line 592: (uint64_t)MICROS_PER_SEC > AFAIK we are following the google style guide here: Rewritten to use long long literal instead of casting. http://gerrit.cloudera.org:8080/#/c/11183/16/be/src/runtime/timestamp-test.cc File be/src/runtime/timestamp-test.cc: http://gerrit.cloudera.org:8080/#/c/11183/16/be/src/runtime/timestamp-test.cc@241 PS16, Line 241: 1000 > It's usually better to use named constants because they express the intent I went for the shortest way I found. http://gerrit.cloudera.org:8080/#/c/11183/16/be/src/runtime/timestamp-value.h File be/src/runtime/timestamp-value.h: http://gerrit.cloudera.org:8080/#/c/11183/16/be/src/runtime/timestamp-value.h@188 PS16, Line 188: (int64_t)1000*1000*1000 > nit: I see, btw you could use C++14 digit separators: 1'000'000'000 Done http://gerrit.cloudera.org:8080/#/c/11183/16/be/src/runtime/timestamp-value.h@318 PS16, Line 318: int64_t SplitTime(int64_t* ticks) > Using different variables lets you use more names to express the calculatio I have kept it as it is for now. I have a plan to do a similar rewrite for AddInterval functions, which will do a lot of similar time splitting. It may turn out that a different interface is more comfortable. -- To view, visit http://gerrit.cloudera.org:8080/11183 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-MessageType: comment Gerrit-Change-Id: I572b5876b979ddae58165bd40d5b008ce9d7a4aa Gerrit-Change-Number: 11183 Gerrit-PatchSet: 16 Gerrit-Owner: Csaba Ringhofer <csringho...@cloudera.com> Gerrit-Reviewer: Attila Jeges <atti...@cloudera.com> Gerrit-Reviewer: Csaba Ringhofer <csringho...@cloudera.com> Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com> Gerrit-Reviewer: Zoltan Borok-Nagy <borokna...@cloudera.com> Gerrit-Comment-Date: Tue, 11 Sep 2018 11:38:48 +0000 Gerrit-HasComments: Yes
