A Sampling profiler for Nim that finds 🌶️ code.
Currently only works on Windows with GCC (mingw).
Supports Linux using GCC(--passL:"-no-pie" is required) and Clang.
How to use:
First compile your exe with --debugger:native to get the line numbers, and probably -d:release or -d:danger because you are profiling:
nim c --debugger:native -d:release your.nim
Then run your executable with hottie:
hottie your.exe
Example:
hottie .\tests\benchmark_svg.exe
First output from the program itself:
name ............................... min time avg time std dv runs
svg decode ........................ 28.371 ms 29.925 ms ±0.259 x167
Then output from hottie:
samples time percent what
581 582.441ms 11.532% C:\mingw64\include\config\i386\cygwin.S:158
349 349.866ms 6.927% C:\p\pixie\src\pixie\paths.nim:1143
290 290.719ms 5.756%
250 250.620ms 4.962% C:\p\bumpy\src\bumpy.nim:489
185 185.459ms 3.672% C:\nim-1.4.6\lib\system\iterators_1.nim:109
110 110.273ms 2.183% C:\nim-1.4.6\lib\system\comparisons.nim:267
109 109.270ms 2.164% C:\p\pixie\src\pixie\paths.nim:1265
106 106.263ms 2.104% C:\p\bumpy\src\bumpy.nim:488
97 97.241ms 1.925% C:\p\pixie\src\pixie\paths.nim:1301
94 94.233ms 1.866% C:\mingw64\include\emmintrin.h:698
91 91.226ms 1.806% C:\nim-1.4.6\lib\system\iterators_1.nim:107
87 87.216ms 1.727% C:\p\pixie\src\pixie\paths.nim:1146
81 81.201ms 1.608% C:\p\pixie\src\pixie\paths.nim:1145
75 75.186ms 1.489% C:\p\vmath\src\vmath.nim:516
68 68.169ms 1.350% C:\mingw64\include\emmintrin.h:1270
62 62.154ms 1.231% C:\mingw64\include\emmintrin.h:1300
58 58.144ms 1.151% C:\p\pixie\src\pixie\paths.nim:1100
53 53.131ms 1.052% C:\p\pixie\src\pixie\paths.nim:1063
52 52.129ms 1.032% C:\p\pixie\src\pixie\paths.nim:991
45 45.112ms 0.893% C:\p\bumpy\src\bumpy.nim:485
45 45.112ms 0.893% C:\nim-1.4.6\lib\system\iterators_1.nim:57
44 44.109ms 0.873% C:\p\pixie\src\pixie\paths.nim:1303
44 44.109ms 0.873% C:\p\pixie\src\pixie\paths.nim:1101
42 42.104ms 0.834% C:\mingw64\include\emmintrin.h:1392
40 40.099ms 0.794% C:\p\pixie\src\pixie\paths.nim:1183
36 36.089ms 0.715% C:\p\pixie\src\pixie\paths.nim:1267
35 35.087ms 0.695% C:\nim-1.4.6\lib\system.nim:1527
35 35.087ms 0.695% C:\nim-1.4.6\lib\system\memory.nim:24
35 35.087ms 0.695% C:\p\pixie\src\pixie\paths.nim:1083
32 32.079ms 0.635% C:\p\pixie\src\pixie\paths.nim:1181
File links should be clickable in your VSCode or other terminals.
Usage:
Usage:
hottie [optional-params] [paths: string...]
Options:
-h, --help print this cligen-erated help
--help-syntax advanced: prepend,plurals,..
-w=, --workingDir= string "" set workingDir
-r=, --rate= int 1000 target rate per second (faster not always possible)
-n=, --numLines= int 30 number of lines to display
-s, --stacks bool false profile by stack traces
-a, --addresses bool false profile by assembly instruction addresses
-l, --lines bool false profile by source lines (default)
-p, --procedures bool false profile by inlined and regular procedure definitions
--regions bool false profile by 'C' stack framed procedure definitions only