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 2,786
bash 118,863 702
osh-native-souffle 118,863 464
osh-native 118,863 419
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 4 1 3 2,698 Build.sh
osh-native-souffle 7 4 3 8 2,698 Build.sh
osh-native 8 5 3 8 2,698 Build.sh
osh-cpython 286 260 26 21 2,698 Build.sh
dash 2 1 1 1 2,512 abuild
bash 5 4 2 3 2,512 abuild
osh-native-souffle 9 5 4 8 2,512 abuild
osh-native 9 7 2 9 2,512 abuild
osh-cpython 379 351 28 22 2,512 abuild
dash 8 7 1 2 20,489 configure
bash 32 32 0 3 20,489 configure
osh-native-souffle 40 34 6 21 20,489 configure
osh-native 45 39 6 21 20,489 configure
osh-cpython 1,838 1,804 34 43 20,489 configure
dash 21 19 2 2 69,779 configure-coreutils
bash 78 77 1 3 69,779 configure-coreutils
osh-native-souffle 144 124 20 51 69,779 configure-coreutils
osh-native 160 140 20 50 69,779 configure-coreutils
osh-cpython 5,415 5,316 97 87 69,779 configure-coreutils
bash 6 5 1 3 2,029 configure-helper.sh
osh-native-souffle 6 4 3 8 2,029 configure-helper.sh
osh-native 7 3 4 8 2,029 configure-helper.sh
osh-cpython 273 249 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 6 3 3 8 1,733 functions
osh-native 6 3 4 8 1,733 functions
osh-cpython 266 240 26 21 1,733 functions
dash 4 4 0 2 9,661 ltmain.sh
bash 17 15 2 4 9,661 ltmain.sh
osh-native-souffle 19 14 5 14 9,661 ltmain.sh
osh-native 21 15 6 15 9,661 ltmain.sh
osh-cpython 847 818 29 29 9,661 ltmain.sh
dash 1 0 1 1 1,679 t4014-format-patch.sh
bash 3 2 2 3 1,679 t4014-format-patch.sh
osh-native-souffle 4 2 2 7 1,679 t4014-format-patch.sh
osh-native 4 2 3 7 1,679 t4014-format-patch.sh
osh-cpython 102 75 27 19 1,679 t4014-format-patch.sh
dash 1 0 1 1 3,123 t9300-fast-import.sh
osh-native-souffle 4 2 2 7 3,123 t9300-fast-import.sh
osh-native 4 2 2 8 3,123 t9300-fast-import.sh
bash 5 4 1 3 3,123 t9300-fast-import.sh
osh-cpython 110 88 22 19 3,123 t9300-fast-import.sh
bash 15 14 1 3 5,160 test-cmd-util.sh
osh-native-souffle 17 14 3 12 5,160 test-cmd-util.sh
osh-native 18 14 4 12 5,160 test-cmd-util.sh
osh-cpython 778 753 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 32,960,784 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,593,031 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,369,041 2,512 abuild
osh-native 45,313,393 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,561,028 20,489 configure
osh-native 276,258,129 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 782,335,026 69,779 configure-coreutils
osh-native 880,753,983 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,530,965 2,029 configure-helper.sh
osh-native 30,633,860 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,858,055 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,969,946 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,402,537 9,661 ltmain.sh
osh-native 113,400,353 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 10,808,299 1,679 t4014-format-patch.sh
osh-native 11,858,186 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 12,672,828 3,123 t9300-fast-import.sh
osh-native 13,920,194 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,439,920 5,160 test-cmd-util.sh
osh-native 112,714,776 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-2f42dc6b
dash dash-0ebcf347
osh-cpython osh-9c6811cb
osh-native osh-d66d8f4b
osh-native-souffle osh-native-souffle-4a1c458b
host label host id
no-host no-host-e4839999

Raw Data

filename
no-host.2025-03-02__00-04-56.cachegrind.tsv
no-host.2025-03-02__00-04-56.times.csv