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 2,721
bash 118,863 694
osh-native 118,863 452
osh-native-souffle 118,863 451
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 5 0 3 2,698 Build.sh
osh-native-souffle 7 7 0 8 2,698 Build.sh
osh-native 8 4 4 8 2,698 Build.sh
osh-cpython 281 253 28 21 2,698 Build.sh
dash 2 0 2 1 2,512 abuild
bash 5 3 3 3 2,512 abuild
osh-native 9 9 0 9 2,512 abuild
osh-native-souffle 9 6 3 8 2,512 abuild
osh-cpython 370 354 16 22 2,512 abuild
dash 8 8 0 2 20,489 configure
bash 32 28 4 4 20,489 configure
osh-native-souffle 43 35 8 20 20,489 configure
osh-native 44 32 12 21 20,489 configure
osh-cpython 1,836 1,796 40 43 20,489 configure
dash 21 21 0 2 69,779 configure-coreutils
bash 81 72 8 3 69,779 configure-coreutils
osh-native 144 120 24 50 69,779 configure-coreutils
osh-native-souffle 149 132 16 51 69,779 configure-coreutils
osh-cpython 5,195 5,118 76 86 69,779 configure-coreutils
bash 6 3 3 3 2,029 configure-helper.sh
osh-native-souffle 6 3 3 8 2,029 configure-helper.sh
osh-native 7 7 0 8 2,029 configure-helper.sh
osh-cpython 272 235 37 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 0 6 7 1,733 functions
osh-native 6 6 0 8 1,733 functions
osh-cpython 260 231 28 21 1,733 functions
dash 4 4 0 2 9,661 ltmain.sh
bash 17 10 7 4 9,661 ltmain.sh
osh-native-souffle 19 4 15 15 9,661 ltmain.sh
osh-native 20 16 4 15 9,661 ltmain.sh
osh-cpython 845 824 20 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 0 4 7 1,679 t4014-format-patch.sh
osh-native 4 4 0 7 1,679 t4014-format-patch.sh
osh-cpython 102 98 4 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 4 0 4 7 3,123 t9300-fast-import.sh
bash 5 5 0 3 3,123 t9300-fast-import.sh
osh-cpython 108 88 20 19 3,123 t9300-fast-import.sh
bash 15 15 0 3 5,160 test-cmd-util.sh
osh-native-souffle 17 7 10 12 5,160 test-cmd-util.sh
osh-native 18 18 0 12 5,160 test-cmd-util.sh
osh-cpython 768 751 17 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 32,959,694 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,591,987 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,367,845 2,512 abuild
osh-native 45,312,719 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,560,270 20,489 configure
osh-native 276,256,320 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 782,334,558 69,779 configure-coreutils
osh-native 880,752,119 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,530,005 2,029 configure-helper.sh
osh-native 30,633,053 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,857,102 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,968,970 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,401,512 9,661 ltmain.sh
osh-native 113,398,814 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 10,808,189 1,679 t4014-format-patch.sh
osh-native 11,857,444 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 12,672,016 3,123 t9300-fast-import.sh
osh-native 13,919,505 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,437,206 5,160 test-cmd-util.sh
osh-native 112,714,588 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-55e3c429
dash dash-0ebcf347
osh-cpython osh-04a83c80
osh-native osh-ad51aa10
osh-native-souffle osh-native-souffle-bb1b3121
host label host id
no-host no-host-556df3ee

Raw Data

filename
no-host.2025-02-24__14-02-03.cachegrind.tsv
no-host.2025-02-24__14-02-03.times.csv