OSH Parser Performance

We time $sh -n $file for various files under various shells, and repeat then run under cachegrind for stable metrics.

Source code: oil/benchmarks/osh-parser.sh

Raw files

Summary

Instructions Per Line (via cachegrind)

Lower numbers are generally better, but each shell recognizes a different language, and OSH uses a more thorough parsing algorithm. In thousands of "I refs".

shell label total lines thousand irefs per line
bash 118,863 15.1
dash 111,674 2.3
osh-native 118,863 13.2
osh-native-souffle 118,863 11.6

(zsh isn't measured because zsh -n unexpectedly forks.)

Average Parsing Rate, Measured on Two Machines (lines/ms)

Shell startup time is included in the elapsed time measurements, but long files are chosen to minimize its effect.

shell label total lines host no-host
dash 111,674 2,751
bash 118,863 713
osh-native-souffle 118,863 474
osh-native 118,863 447
osh-cpython 118,863 12

Per-File Measurements

Time and Memory

shell label elapsed ms user ms sys ms max rss MB num lines filename
dash 2 1 1 1 2,698 Build.sh
bash 4 3 1 3 2,698 Build.sh
osh-native-souffle 7 5 2 8 2,698 Build.sh
osh-native 7 5 2 8 2,698 Build.sh
osh-cpython 271 248 23 21 2,698 Build.sh
dash 2 1 1 1 2,512 abuild
bash 5 5 0 3 2,512 abuild
osh-native-souffle 9 5 4 8 2,512 abuild
osh-native 9 7 2 9 2,512 abuild
osh-cpython 356 341 16 21 2,512 abuild
dash 8 7 1 2 20,489 configure
bash 32 32 0 4 20,489 configure
osh-native-souffle 41 35 6 21 20,489 configure
osh-native 44 34 9 21 20,489 configure
osh-cpython 1,775 1,734 42 42 20,489 configure
dash 22 22 0 2 69,779 configure-coreutils
bash 77 77 0 3 69,779 configure-coreutils
osh-native-souffle 140 118 21 51 69,779 configure-coreutils
osh-native 148 122 26 50 69,779 configure-coreutils
osh-cpython 5,194 5,119 75 86 69,779 configure-coreutils
bash 5 3 2 3 2,029 configure-helper.sh
osh-native-souffle 6 3 3 8 2,029 configure-helper.sh
osh-native 6 4 2 8 2,029 configure-helper.sh
osh-cpython 262 246 17 20 2,029 configure-helper.sh
dash 1 1 0 1 1,733 functions
bash 4 4 0 3 1,733 functions
osh-native-souffle 6 3 3 8 1,733 functions
osh-native 6 2 4 8 1,733 functions
osh-cpython 247 226 21 20 1,733 functions
dash 4 4 0 2 9,661 ltmain.sh
bash 17 17 0 4 9,661 ltmain.sh
osh-native-souffle 19 15 4 14 9,661 ltmain.sh
osh-native 20 14 6 15 9,661 ltmain.sh
osh-cpython 840 810 30 28 9,661 ltmain.sh
dash 1 0 1 1 1,679 t4014-format-patch.sh
bash 3 2 1 3 1,679 t4014-format-patch.sh
osh-native-souffle 4 2 2 7 1,679 t4014-format-patch.sh
osh-native 4 1 3 7 1,679 t4014-format-patch.sh
osh-cpython 94 76 19 18 1,679 t4014-format-patch.sh
dash 1 0 1 1 3,123 t9300-fast-import.sh
osh-native-souffle 4 2 2 7 3,123 t9300-fast-import.sh
osh-native 4 1 3 7 3,123 t9300-fast-import.sh
bash 4 4 1 3 3,123 t9300-fast-import.sh
osh-cpython 99 82 17 18 3,123 t9300-fast-import.sh
bash 15 15 0 3 5,160 test-cmd-util.sh
osh-native-souffle 16 14 2 12 5,160 test-cmd-util.sh
osh-native 18 15 3 12 5,160 test-cmd-util.sh
osh-cpython 770 736 34 27 5,160 test-cmd-util.sh

Instruction Counts

shell label irefs num lines filename
dash 6,416,010 2,698 Build.sh
osh-native-souffle 33,381,441 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,918,049 2,698 Build.sh
dash 7,042,147 2,512 abuild
osh-native-souffle 39,417,713 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native 45,796,025 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 244,817,418 20,489 configure
osh-native 279,103,302 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 783,615,709 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native 889,627,590 69,779 configure-coreutils
osh-native-souffle 26,933,257 2,029 configure-helper.sh
osh-native 31,002,440 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 25,257,607 1,733 functions
bash 28,169,399 1,733 functions
osh-native 29,272,244 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 98,845,480 9,661 ltmain.sh
osh-native 114,613,230 9,661 ltmain.sh
bash 172,930,991 9,661 ltmain.sh
dash 3,166,564 1,679 t4014-format-patch.sh
osh-native-souffle 10,916,250 1,679 t4014-format-patch.sh
osh-native 11,947,284 1,679 t4014-format-patch.sh
bash 25,314,918 1,679 t4014-format-patch.sh
dash 4,357,271 3,123 t9300-fast-import.sh
osh-native-souffle 12,816,257 3,123 t9300-fast-import.sh
osh-native 14,054,059 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 98,913,262 5,160 test-cmd-util.sh
osh-native 113,844,933 5,160 test-cmd-util.sh
bash 161,950,200 5,160 test-cmd-util.sh

Shell and Host Details

shell label shell id
bash bash-e2dc196f
dash dash-0ebcf347
osh-cpython osh-f41bdeb4
osh-native osh-bcec1363
osh-native-souffle osh-native-souffle-bfda1f2a
host label host id
no-host no-host-e5b8d3ee

Raw Data

filename
no-host.2024-09-27__06-07-50.cachegrind.tsv
no-host.2024-09-27__06-07-50.times.csv