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 2,678
bash 118,863 698
osh-native-souffle 118,863 412
osh-native 118,863 379
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 0 2 1 2,698 Build.sh
bash 5 2 2 3 2,698 Build.sh
osh-native-souffle 7 7 0 8 2,698 Build.sh
osh-native 8 8 0 8 2,698 Build.sh
osh-cpython 284 251 32 21 2,698 Build.sh
dash 2 2 0 1 2,512 abuild
bash 5 5 0 3 2,512 abuild
osh-native 9 9 0 9 2,512 abuild
osh-native-souffle 9 9 0 8 2,512 abuild
osh-cpython 375 339 36 22 2,512 abuild
dash 9 9 0 2 20,489 configure
bash 32 32 0 3 20,489 configure
osh-native-souffle 47 39 8 21 20,489 configure
osh-native 56 48 8 21 20,489 configure
osh-cpython 1,810 1,741 68 43 20,489 configure
dash 21 18 4 2 69,779 configure-coreutils
bash 77 77 0 3 69,779 configure-coreutils
osh-native-souffle 165 130 35 51 69,779 configure-coreutils
osh-native 176 156 20 50 69,779 configure-coreutils
osh-cpython 5,443 5,343 96 87 69,779 configure-coreutils
bash 6 3 3 3 2,029 configure-helper.sh
osh-native-souffle 7 7 0 8 2,029 configure-helper.sh
osh-native 7 3 3 8 2,029 configure-helper.sh
osh-cpython 275 250 24 21 2,029 configure-helper.sh
dash 2 2 0 1 1,733 functions
bash 4 4 0 3 1,733 functions
osh-native-souffle 6 6 0 8 1,733 functions
osh-native 7 3 3 8 1,733 functions
osh-cpython 266 241 24 21 1,733 functions
dash 4 4 0 2 9,661 ltmain.sh
bash 17 17 0 4 9,661 ltmain.sh
osh-native-souffle 21 17 4 15 9,661 ltmain.sh
osh-native 24 16 8 15 9,661 ltmain.sh
osh-cpython 854 821 32 29 9,661 ltmain.sh
dash 1 1 0 1 1,679 t4014-format-patch.sh
bash 4 0 4 3 1,679 t4014-format-patch.sh
osh-native-souffle 4 0 4 7 1,679 t4014-format-patch.sh
osh-native 4 0 4 7 1,679 t4014-format-patch.sh
osh-cpython 106 81 24 19 1,679 t4014-format-patch.sh
dash 1 1 0 1 3,123 t9300-fast-import.sh
osh-native 4 0 4 7 3,123 t9300-fast-import.sh
osh-native-souffle 5 0 5 7 3,123 t9300-fast-import.sh
bash 5 5 0 3 3,123 t9300-fast-import.sh
osh-cpython 116 98 17 19 3,123 t9300-fast-import.sh
bash 15 11 4 3 5,160 test-cmd-util.sh
osh-native-souffle 17 13 4 12 5,160 test-cmd-util.sh
osh-native 19 18 0 12 5,160 test-cmd-util.sh
osh-cpython 781 757 24 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 32,959,667 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,591,960 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,367,819 2,512 abuild
osh-native 45,312,693 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,560,213 20,489 configure
osh-native 276,256,293 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 782,334,501 69,779 configure-coreutils
osh-native 880,752,123 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,529,978 2,029 configure-helper.sh
osh-native 30,633,026 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,857,105 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,968,943 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,401,455 9,661 ltmain.sh
osh-native 113,398,788 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 10,808,192 1,679 t4014-format-patch.sh
osh-native 11,857,417 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 12,671,959 3,123 t9300-fast-import.sh
osh-native 13,919,478 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,437,149 5,160 test-cmd-util.sh
osh-native 112,714,562 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-b5193497
dash dash-0ebcf347
osh-cpython osh-34d7cc48
osh-native osh-39b6174f
osh-native-souffle osh-native-souffle-29198dce
host label host id
no-host no-host-556df3ee

Raw Data

filename
no-host.2025-02-24__11-44-16.cachegrind.tsv
no-host.2025-02-24__11-44-16.times.csv