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 2,730
bash 118,863 690
osh-native-souffle 118,863 466
osh-native 118,863 409
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 2 0 1 2,698 Build.sh
bash 5 4 1 3 2,698 Build.sh
osh-native-souffle 7 5 2 8 2,698 Build.sh
osh-native 8 6 2 8 2,698 Build.sh
osh-cpython 288 265 23 21 2,698 Build.sh
dash 2 1 1 1 2,512 abuild
bash 5 4 2 3 2,512 abuild
osh-native 9 7 2 9 2,512 abuild
osh-native-souffle 10 7 2 8 2,512 abuild
osh-cpython 372 351 21 22 2,512 abuild
dash 9 7 2 2 20,489 configure
bash 35 34 1 3 20,489 configure
osh-native-souffle 41 35 6 20 20,489 configure
osh-native 46 38 8 21 20,489 configure
osh-cpython 1,842 1,793 49 43 20,489 configure
dash 21 20 1 2 69,779 configure-coreutils
bash 78 76 2 3 69,779 configure-coreutils
osh-native-souffle 140 121 19 51 69,779 configure-coreutils
osh-native 166 147 18 50 69,779 configure-coreutils
osh-cpython 5,417 5,336 79 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 4 3 9 2,029 configure-helper.sh
osh-cpython 268 245 23 21 2,029 configure-helper.sh
dash 1 0 1 1 1,733 functions
bash 4 4 0 3 1,733 functions
osh-native-souffle 6 2 4 8 1,733 functions
osh-native 7 3 4 8 1,733 functions
osh-cpython 263 240 23 21 1,733 functions
dash 5 4 1 2 9,661 ltmain.sh
bash 17 16 1 4 9,661 ltmain.sh
osh-native-souffle 19 13 6 15 9,661 ltmain.sh
osh-native 21 18 3 15 9,661 ltmain.sh
osh-cpython 851 816 36 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 1 3 7 1,679 t4014-format-patch.sh
osh-cpython 101 82 19 19 1,679 t4014-format-patch.sh
dash 1 0 1 1 3,123 t9300-fast-import.sh
osh-native-souffle 4 0 4 7 3,123 t9300-fast-import.sh
osh-native 4 3 1 7 3,123 t9300-fast-import.sh
bash 5 4 1 3 3,123 t9300-fast-import.sh
osh-cpython 107 89 18 19 3,123 t9300-fast-import.sh
bash 15 15 0 3 5,160 test-cmd-util.sh
osh-native-souffle 17 15 2 12 5,160 test-cmd-util.sh
osh-native 18 16 2 12 5,160 test-cmd-util.sh
osh-cpython 774 747 26 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 32,959,709 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,591,967 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,367,975 2,512 abuild
osh-native 45,312,833 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,560,429 20,489 configure
osh-native 276,256,571 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 782,336,409 69,779 configure-coreutils
osh-native 880,754,758 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,530,038 2,029 configure-helper.sh
osh-native 30,633,016 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,857,138 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,968,937 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,401,149 9,661 ltmain.sh
osh-native 113,399,101 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 10,808,116 1,679 t4014-format-patch.sh
osh-native 11,857,524 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 12,671,989 3,123 t9300-fast-import.sh
osh-native 13,919,468 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,437,714 5,160 test-cmd-util.sh
osh-native 112,715,924 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-5242bba1
dash dash-0ebcf347
osh-cpython osh-05d7d649
osh-native osh-3c3f47ca
osh-native-souffle osh-native-souffle-ceb2e824
host label host id
no-host no-host-e4839999

Raw Data

filename
no-host.2025-02-27__02-42-14.cachegrind.tsv
no-host.2025-02-27__02-42-14.times.csv