f938755a33
libcxx: Rename .hpp files in libcxx/benchmarks to .h
...
LLVM uses .h as its extension for header files.
Differential Revision: https://reviews.llvm.org/D66509
llvm-svn: 369487
2019-08-21 01:59:12 +00:00
27a83e99f4
Add more benchmarks for literal strings.
...
Summary:
Comparing against the empty string should generate much better code that
what it does today.
We can also generate better code when comparing against literals that
are larger than the SSO space.
Reviewers: EricWF
Subscribers: christof, jdoerfert, libcxx-commits
Tags: #libc
Differential Revision: https://reviews.llvm.org/D59781
llvm-svn: 357614
2019-04-03 17:40:51 +00:00
9b7aa02b53
Add relational benchmark against a string constant.
...
Summary:
Add relational benchmark against a string constant.
These can potentially trigger inlining of the operations. We want to
benchmark that.
Reviewers: EricWF
Subscribers: christof, jdoerfert, libcxx-commits
Tags: #libc
Differential Revision: https://reviews.llvm.org/D59512
llvm-svn: 356680
2019-03-21 16:06:15 +00:00
3bea50aeb3
Fix UB in string.bench.cpp.
...
The usage of aligned_storage failed to pass the alignment it wanted,
which caused it to have a larger size and alignment that the
std::string's it was intended to store.
This patch manually specifies the alignment, as well as cleaning up
type alias bugs.
llvm-svn: 346779
2018-11-13 19:16:19 +00:00
74583444e7
Add more benchmarks for std::string.
...
Summary:
Added benchmarks for Construct, Copy, Move, Destroy, Relationals and
Read. On the ones that matter, the benchmarks tests hot and cold data,
and opaque and transparent inputs.
Reviewers: EricWF
Subscribers: christof, ldionne, libcxx-commits
Differential Revision: https://reviews.llvm.org/D53825
llvm-svn: 345611
2018-10-30 15:54:22 +00:00
09701324a1
Add new string benchmarks
...
llvm-svn: 336636
2018-07-10 04:11:22 +00:00
1903976d37
Update Google Benchmark library
...
llvm-svn: 322812
2018-01-18 04:23:01 +00:00
9070500633
improve performance of string::find
...
string::find used to call the generic algorithm ::find. The patch special
case string::find such that it ultimately gets converted to calls to memchr
and memcmp.
The patch improves the performance of the string::find routine by about 20x.
Without the patch, the performance on an x86_64-linux 3400 MHz machine is:
Benchmark Time CPU Iterations
-----------------------------------------------------------------
BM_StringFindNoMatch/10 4 ns 4 ns 166421326
BM_StringFindNoMatch/64 37 ns 37 ns 18754392
BM_StringFindNoMatch/512 268 ns 268 ns 2586060
BM_StringFindNoMatch/4k 2143 ns 2144 ns 328342
BM_StringFindNoMatch/32k 16910 ns 16917 ns 40623
BM_StringFindNoMatch/128k 67577 ns 67602 ns 10138
BM_StringFindAllMatch/1 3 ns 3 ns 265163471
BM_StringFindAllMatch/8 6 ns 6 ns 112582467
BM_StringFindAllMatch/64 36 ns 36 ns 19566457
BM_StringFindAllMatch/512 209 ns 209 ns 3318893
BM_StringFindAllMatch/4k 1618 ns 1618 ns 432963
BM_StringFindAllMatch/32k 12909 ns 12914 ns 54317
BM_StringFindAllMatch/128k 48342 ns 48361 ns 13922
BM_StringFindMatch1/1 33777 ns 33790 ns 20698
BM_StringFindMatch1/8 33940 ns 33953 ns 20619
BM_StringFindMatch1/64 34038 ns 34051 ns 20571
BM_StringFindMatch1/512 34217 ns 34230 ns 20480
BM_StringFindMatch1/4k 35510 ns 35524 ns 19752
BM_StringFindMatch1/32k 46438 ns 46456 ns 15030
BM_StringFindMatch2/1 33839 ns 33852 ns 20648
BM_StringFindMatch2/8 33950 ns 33963 ns 20594
BM_StringFindMatch2/64 33846 ns 33859 ns 20668
BM_StringFindMatch2/512 34023 ns 34036 ns 20279
BM_StringFindMatch2/4k 35422 ns 35436 ns 19716
BM_StringFindMatch2/32k 46570 ns 46588 ns 15027
With the patch applied
Benchmark Time CPU Iterations
-----------------------------------------------------------------
BM_StringFindNoMatch/10 5 ns 5 ns 133724346
BM_StringFindNoMatch/64 6 ns 6 ns 119312184
BM_StringFindNoMatch/512 13 ns 13 ns 51539628
BM_StringFindNoMatch/4k 77 ns 77 ns 8935934
BM_StringFindNoMatch/32k 551 ns 551 ns 1222808
BM_StringFindNoMatch/128k 2684 ns 2685 ns 259957
BM_StringFindAllMatch/1 7 ns 7 ns 98017959
BM_StringFindAllMatch/8 7 ns 7 ns 91466911
BM_StringFindAllMatch/64 8 ns 8 ns 85707392
BM_StringFindAllMatch/512 20 ns 20 ns 34490895
BM_StringFindAllMatch/4k 93 ns 93 ns 7360375
BM_StringFindAllMatch/32k 827 ns 828 ns 829944
BM_StringFindAllMatch/128k 3593 ns 3594 ns 195815
BM_StringFindMatch1/1 1332 ns 1332 ns 516354
BM_StringFindMatch1/8 1336 ns 1336 ns 495876
BM_StringFindMatch1/64 1338 ns 1339 ns 516656
BM_StringFindMatch1/512 1357 ns 1357 ns 510717
BM_StringFindMatch1/4k 1485 ns 1486 ns 461228
BM_StringFindMatch1/32k 2235 ns 2236 ns 318253
BM_StringFindMatch2/1 1335 ns 1335 ns 517105
BM_StringFindMatch2/8 1336 ns 1337 ns 518004
BM_StringFindMatch2/64 1344 ns 1345 ns 511751
BM_StringFindMatch2/512 1361 ns 1361 ns 508150
BM_StringFindMatch2/4k 1611 ns 1611 ns 463388
BM_StringFindMatch2/32k 2187 ns 2187 ns 317532
Patch written by Aditya Kumar and Sebastian Pop.
Differential Revision: https://reviews.llvm.org/D27068
llvm-svn: 290761
2016-12-30 18:01:36 +00:00
Nico Weber