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 2,774
bash 118,863 570
osh-native-souffle 118,863 491
osh-native 118,863 437
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 5 0 3 2,698 Build.sh
osh-native-souffle 7 4 3 8 2,698 Build.sh
osh-native 8 7 1 8 2,698 Build.sh
osh-cpython 283 259 24 22 2,698 Build.sh
dash 2 2 0 1 2,512 abuild
bash 6 4 2 3 2,512 abuild
osh-native-souffle 8 5 3 8 2,512 abuild
osh-native 9 7 2 9 2,512 abuild
osh-cpython 379 361 18 22 2,512 abuild
dash 9 8 1 2 20,489 configure
bash 32 31 1 4 20,489 configure
osh-native-souffle 40 33 7 20 20,489 configure
osh-native 45 38 7 21 20,489 configure
osh-cpython 1,811 1,772 39 43 20,489 configure
dash 21 19 2 2 69,779 configure-coreutils
bash 118 117 1 3 69,779 configure-coreutils
osh-native-souffle 133 117 16 49 69,779 configure-coreutils
osh-native 151 126 25 50 69,779 configure-coreutils
osh-cpython 5,259 5,189 69 87 69,779 configure-coreutils
bash 5 4 1 3 2,029 configure-helper.sh
osh-native-souffle 6 5 1 8 2,029 configure-helper.sh
osh-native 7 7 0 8 2,029 configure-helper.sh
osh-cpython 267 246 22 21 2,029 configure-helper.sh
dash 1 1 0 1 1,733 functions
bash 4 2 1 3 1,733 functions
osh-native-souffle 6 5 1 8 1,733 functions
osh-native 6 3 4 8 1,733 functions
osh-cpython 259 240 20 21 1,733 functions
dash 4 4 0 2 9,661 ltmain.sh
bash 17 14 2 4 9,661 ltmain.sh
osh-native-souffle 18 12 6 15 9,661 ltmain.sh
osh-native 20 14 6 15 9,661 ltmain.sh
osh-cpython 860 833 27 29 9,661 ltmain.sh
dash 1 0 1 1 1,679 t4014-format-patch.sh
bash 3 3 0 3 1,679 t4014-format-patch.sh
osh-native-souffle 4 1 3 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 1 0 1 3,123 t9300-fast-import.sh
osh-native-souffle 4 3 1 7 3,123 t9300-fast-import.sh
osh-native 4 0 4 7 3,123 t9300-fast-import.sh
bash 5 4 1 3 3,123 t9300-fast-import.sh
osh-cpython 109 86 24 19 3,123 t9300-fast-import.sh
bash 15 14 1 3 5,160 test-cmd-util.sh
osh-native-souffle 16 14 2 12 5,160 test-cmd-util.sh
osh-native 18 12 6 12 5,160 test-cmd-util.sh
osh-cpython 766 736 30 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 32,961,936 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,599,726 2,698 Build.sh
dash 7,042,147 2,512 abuild
osh-native-souffle 38,798,451 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native 45,321,057 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,632,053 20,489 configure
osh-native 276,275,117 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 782,423,418 69,779 configure-coreutils
osh-native 880,783,702 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,542,028 2,029 configure-helper.sh
osh-native 30,639,232 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,867,226 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,974,636 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,424,996 9,661 ltmain.sh
osh-native 113,409,566 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 10,812,704 1,679 t4014-format-patch.sh
osh-native 11,862,408 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 12,676,832 3,123 t9300-fast-import.sh
osh-native 13,924,035 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,477,024 5,160 test-cmd-util.sh
osh-native 112,727,513 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-47ae9d61
dash dash-0ebcf347
osh-cpython osh-96bc4e03
osh-native osh-775a1af6
osh-native-souffle osh-native-souffle-81f5bc3e
host label host id
no-host no-host-e4839999

Raw Data

filename
no-host.2025-03-21__20-35-09.cachegrind.tsv
no-host.2025-03-21__20-35-09.times.csv