https://github.com/ken-matsui/gcc-benches/blob/9a0ae22762b6771b5539a8282e0c50469b04ad64/is_const.cc
$ xg++ --version
xg++ (GCC) 14.0.0 20230624 (experimental)
Copyright (C) 2023 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ git rev-parse HEAD~2 # base commit
ad5ab848cc487b3f7fd82c7cb3c408747bd10422$ git log -n 2 --pretty=format:%H # changes from the base
11652e3a2136732de2b7b8c83c2aeddf98d2c67c
d4a9d9e969967e02e561cf2257eec0153cb2b882$ perf stat xg++ -c is_const.cc
x /tmp/tmp.fHBeLn1UQY/time_before.txt
+ /tmp/tmp.fHBeLn1UQY/time_after.txt
+----------------------------------------------------------------------+
| + + x x |
| + +++++ x x x +* x x x x|
||________M____A_________|___|____________MA_________________| |
+----------------------------------------------------------------------+
N Min Max Median Avg Stddev
x 10 2.8369596 2.9768198 2.8944361 2.8967748 0.053125532
+ 10 2.7842257 2.8932365 2.7976753 2.8137918 0.042003456
Difference at 95.0% confidence
-0.082983 +/- 0.0449958
-2.86467% +/- 1.55331%
(Student's t, pooled s = 0.0478885)$ /usr/bin/time -v xg++ -c is_const.cc
x /tmp/tmp.fHBeLn1UQY/peak_mem_before.txt
+ /tmp/tmp.fHBeLn1UQY/peak_mem_after.txt
+----------------------------------------------------------------------+
| + x |
| + x |
|++ xx |
|+++ xxx|
|+++ xxx|
||A |A||
+----------------------------------------------------------------------+
N Min Max Median Avg Stddev
x 10 910780 911140 911000 910982.8 103.81265
+ 10 901164 901424 901280 901277.2 86.8214
Difference at 95.0% confidence
-9705.6 +/- 89.9145
-1.0654% +/- 0.00987006%
(Student's t, pooled s = 95.6949)$ xg++ -ftime-report -c is_const.cc
x /tmp/tmp.fHBeLn1UQY/total_mem_before.txt
+ /tmp/tmp.fHBeLn1UQY/total_mem_after.txt
+----------------------------------------------------------------------+
|+ x|
|+ x|
|+ x|
|+ x|
|+ x|
|+ x|
|+ x|
|+ x|
|+ x|
|+ x|
|A A|
+----------------------------------------------------------------------+
N Min Max Median Avg Stddev
x 10 1047 1047 1047 1047 0
+ 10 1030 1030 1030 1030 0
Difference at 95.0% confidence
-17 +/- 0
-1.62369% +/- 0%
(Student's t, pooled s = 0)$ xg++ --version
xg++ (GCC) 14.0.0 20231016 (experimental)
Copyright (C) 2023 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ perf stat xg++ -std=c++2b -c is_const_v.cc
x /tmp/tmp.shmGiKjlLP/time_no_builtin.txt
+ /tmp/tmp.shmGiKjlLP/time_builtin.txt
+----------------------------------------------------------------------+
| +x x |
| + ++ ** + x x +* +|
||___________|M_A_M_A_________________| |
+----------------------------------------------------------------------+
N Min Max Median Avg Stddev
x 10 3.0253811 3.1380586 3.0845513 3.0694214 0.036943147
+ 10 2.9346009 3.6644088 3.0363344 3.1034796 0.20638017
No difference proven at 95.0% confidence$ /usr/bin/time -v xg++ -std=c++2b -c is_const_v.cc
x /tmp/tmp.shmGiKjlLP/peak_mem_no_builtin.txt
+ /tmp/tmp.shmGiKjlLP/peak_mem_builtin.txt
+----------------------------------------------------------------------+
| + |
| + x |
| + xx |
| +++ xx |
|++++ x xxxx|
| |A| |AM||
+----------------------------------------------------------------------+
N Min Max Median Avg Stddev
x 10 910328 910704 910624 910573.6 108.24171
+ 10 905228 905492 905404 905373.6 84.710225
Difference at 95.0% confidence
-5200 +/- 91.32
-0.571069% +/- 0.0100288%
(Student's t, pooled s = 97.1908)$ xg++ -ftime-report -std=c++2b -c is_const_v.cc
x /tmp/tmp.shmGiKjlLP/total_mem_no_builtin.txt
+ /tmp/tmp.shmGiKjlLP/total_mem_builtin.txt
+----------------------------------------------------------------------+
|+ x|
|+ x|
|+ x|
|+ x|
|+ x|
|+ x|
|+ x|
|+ x|
|+ x|
|+ x|
|A A|
+----------------------------------------------------------------------+
N Min Max Median Avg Stddev
x 10 1052 1052 1052 1052 0
+ 10 1044 1044 1044 1044 0
Difference at 95.0% confidence
-8 +/- 0
-0.760456% +/- 0%
(Student's t, pooled s = 0)x ./reports/built-ins/is_const_v/time_no_builtin.txt
+ ./reports/built-ins/is_const_v/time_builtin.txt
+----------------------------------------------------------------------+
|x + x ++++ x+ + + + x xx x x + x|
| |_____|_________M_A_________A_______|_____________| |
+----------------------------------------------------------------------+
N Min Max Median Avg Stddev
x 10 3.5120669 4.030555 3.8247304 3.7676719 0.16274897
+ 10 3.5273867 4.0135123 3.677902 3.6938835 0.13430699
No difference proven at 95.0% confidencex ./reports/built-ins/is_const_v/peak_mem_no_builtin.txt
+ ./reports/built-ins/is_const_v/peak_mem_builtin.txt
+----------------------------------------------------------------------+
| + |
| ++ xx x|
|+++ xx x|
|++++ xxx x|
||A| |A| |
+----------------------------------------------------------------------+
N Min Max Median Avg Stddev
x 10 909988 910304 910108 910137.2 111.58733
+ 10 904236 904496 904352 904351.2 84.175478
Difference at 95.0% confidence
-5786 +/- 92.8662
-0.635728% +/- 0.0102035%
(Student's t, pooled s = 98.8363)x ./reports/built-ins/is_const_v/total_mem_no_builtin.txt
+ ./reports/built-ins/is_const_v/total_mem_builtin.txt
+----------------------------------------------------------------------+
|+ x|
|+ x|
|+ x|
|+ x|
|+ x|
|+ x|
|+ x|
|+ x|
|+ x|
|+ x|
|A A|
+----------------------------------------------------------------------+
N Min Max Median Avg Stddev
x 10 1052 1052 1052 1052 0
+ 10 1044 1044 1044 1044 0
Difference at 95.0% confidence
-8 +/- 0
-0.760456% +/- 0%
(Student's t, pooled s = 0)