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 13.1
osh-native-souffle 118,863 11.5

(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 2,783
bash 118,863 698
osh-native-souffle 118,863 481
osh-native 118,863 430
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 5 4 1 3 2,698 Build.sh
osh-native-souffle 7 4 3 8 2,698 Build.sh
osh-native 8 3 5 8 2,698 Build.sh
osh-cpython 279 258 20 22 2,698 Build.sh
dash 2 1 1 1 2,512 abuild
bash 5 4 1 3 2,512 abuild
osh-native-souffle 9 7 2 8 2,512 abuild
osh-native 9 6 3 9 2,512 abuild
osh-cpython 372 352 20 22 2,512 abuild
dash 8 7 1 2 20,489 configure
bash 32 31 1 4 20,489 configure
osh-native-souffle 41 32 9 20 20,489 configure
osh-native 43 37 6 21 20,489 configure
osh-cpython 1,823 1,788 35 43 20,489 configure
dash 21 19 2 2 69,779 configure-coreutils
bash 79 78 1 3 69,779 configure-coreutils
osh-native-souffle 136 118 18 49 69,779 configure-coreutils
osh-native 157 141 16 50 69,779 configure-coreutils
osh-cpython 5,317 5,229 87 86 69,779 configure-coreutils
bash 5 4 1 3 2,029 configure-helper.sh
osh-native-souffle 6 4 2 8 2,029 configure-helper.sh
osh-native 7 5 2 8 2,029 configure-helper.sh
osh-cpython 275 255 20 21 2,029 configure-helper.sh
dash 1 1 0 1 1,733 functions
bash 4 3 1 3 1,733 functions
osh-native-souffle 6 1 5 8 1,733 functions
osh-native 6 5 1 8 1,733 functions
osh-cpython 263 239 25 21 1,733 functions
dash 4 4 0 2 9,661 ltmain.sh
bash 17 16 1 4 9,661 ltmain.sh
osh-native-souffle 19 13 5 15 9,661 ltmain.sh
osh-native 20 17 3 15 9,661 ltmain.sh
osh-cpython 844 806 37 29 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 3 1 7 1,679 t4014-format-patch.sh
osh-native 4 2 2 7 1,679 t4014-format-patch.sh
osh-cpython 102 84 18 19 1,679 t4014-format-patch.sh
dash 1 0 1 1 3,123 t9300-fast-import.sh
osh-native-souffle 4 1 3 7 3,123 t9300-fast-import.sh
osh-native 4 2 2 7 3,123 t9300-fast-import.sh
bash 5 5 0 3 3,123 t9300-fast-import.sh
osh-cpython 106 86 20 19 3,123 t9300-fast-import.sh
bash 15 14 1 3 5,160 test-cmd-util.sh
osh-native-souffle 16 13 3 12 5,160 test-cmd-util.sh
osh-native 18 15 3 12 5,160 test-cmd-util.sh
osh-cpython 789 765 25 28 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 32,957,540 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,593,927 2,698 Build.sh
dash 7,042,147 2,512 abuild
osh-native-souffle 38,793,890 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native 45,316,561 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,620,502 20,489 configure
osh-native 276,263,284 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 782,404,447 69,779 configure-coreutils
osh-native 880,763,689 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,538,869 2,029 configure-helper.sh
osh-native 30,635,769 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,864,070 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,971,429 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,419,848 9,661 ltmain.sh
osh-native 113,403,710 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 10,811,232 1,679 t4014-format-patch.sh
osh-native 11,860,459 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 12,675,032 3,123 t9300-fast-import.sh
osh-native 13,922,398 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,462,552 5,160 test-cmd-util.sh
osh-native 112,722,052 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-b0a008ee
dash dash-0ebcf347
osh-cpython osh-5375de5b
osh-native osh-36328cf9
osh-native-souffle osh-native-souffle-99404bd9
host label host id
no-host no-host-e4839999

Raw Data

filename
no-host.2025-03-06__17-19-12.cachegrind.tsv
no-host.2025-03-06__17-19-12.times.csv