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 2,712
bash 118,863 693
osh-native-souffle 118,863 397
osh-native 118,863 359
osh-cpython 118,863 11

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 8 6 2 8 2,698 Build.sh
osh-native 8 6 2 8 2,698 Build.sh
osh-cpython 298 271 27 22 2,698 Build.sh
dash 2 1 1 1 2,512 abuild
bash 5 5 1 3 2,512 abuild
osh-native-souffle 8 4 4 8 2,512 abuild
osh-native 9 6 4 9 2,512 abuild
osh-cpython 389 367 23 22 2,512 abuild
dash 8 7 1 2 20,489 configure
bash 32 31 1 3 20,489 configure
osh-native-souffle 48 42 6 20 20,489 configure
osh-native 53 40 13 21 20,489 configure
osh-cpython 1,921 1,870 51 43 20,489 configure
dash 21 21 0 2 69,779 configure-coreutils
bash 78 76 2 3 69,779 configure-coreutils
osh-native-souffle 173 155 18 49 69,779 configure-coreutils
osh-native 193 166 27 50 69,779 configure-coreutils
osh-cpython 5,516 5,428 87 87 69,779 configure-coreutils
bash 6 4 1 3 2,029 configure-helper.sh
osh-native-souffle 7 3 4 8 2,029 configure-helper.sh
osh-native 7 4 3 8 2,029 configure-helper.sh
osh-cpython 288 264 24 21 2,029 configure-helper.sh
dash 1 1 0 1 1,733 functions
bash 4 2 2 3 1,733 functions
osh-native-souffle 7 3 4 8 1,733 functions
osh-native 7 6 1 8 1,733 functions
osh-cpython 271 251 20 21 1,733 functions
dash 4 4 0 2 9,661 ltmain.sh
bash 18 17 1 4 9,661 ltmain.sh
osh-native-souffle 22 15 7 15 9,661 ltmain.sh
osh-native 24 14 10 15 9,661 ltmain.sh
osh-cpython 883 853 30 29 9,661 ltmain.sh
dash 1 0 1 1 1,679 t4014-format-patch.sh
bash 4 3 1 3 1,679 t4014-format-patch.sh
osh-native 4 2 2 7 1,679 t4014-format-patch.sh
osh-native-souffle 4 1 3 7 1,679 t4014-format-patch.sh
osh-cpython 110 84 26 19 1,679 t4014-format-patch.sh
dash 1 1 0 1 3,123 t9300-fast-import.sh
osh-native-souffle 4 2 2 7 3,123 t9300-fast-import.sh
bash 5 2 3 3 3,123 t9300-fast-import.sh
osh-native 5 2 3 7 3,123 t9300-fast-import.sh
osh-cpython 116 96 21 19 3,123 t9300-fast-import.sh
bash 15 14 1 3 5,160 test-cmd-util.sh
osh-native-souffle 18 13 5 12 5,160 test-cmd-util.sh
osh-native 20 17 3 12 5,160 test-cmd-util.sh
osh-cpython 805 780 24 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 32,961,823 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,599,731 2,698 Build.sh
dash 7,042,147 2,512 abuild
osh-native-souffle 38,798,338 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native 45,321,063 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,631,970 20,489 configure
osh-native 276,275,122 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 782,423,336 69,779 configure-coreutils
osh-native 880,783,738 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,541,915 2,029 configure-helper.sh
osh-native 30,639,237 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,867,113 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,974,641 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,425,076 9,661 ltmain.sh
osh-native 113,409,101 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 10,812,715 1,679 t4014-format-patch.sh
osh-native 11,862,256 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 12,676,719 3,123 t9300-fast-import.sh
osh-native 13,924,040 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,477,007 5,160 test-cmd-util.sh
osh-native 112,727,220 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-42705137
dash dash-0ebcf347
osh-cpython osh-b7f10b91
osh-native osh-66c8843e
osh-native-souffle osh-native-souffle-a0793442
host label host id
no-host no-host-e4839999

Raw Data

filename
no-host.2025-03-22__14-17-17.cachegrind.tsv
no-host.2025-03-22__14-17-17.times.csv