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 13.0
osh-native-souffle 118,863 11.4

(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 2,701
bash 118,863 701
osh-native-souffle 118,863 470
osh-native 118,863 441
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 5 0 3 2,698 Build.sh
osh-native-souffle 7 0 7 8 2,698 Build.sh
osh-native 8 8 0 8 2,698 Build.sh
osh-cpython 289 248 40 21 2,698 Build.sh
dash 2 2 0 1 2,512 abuild
bash 5 5 0 3 2,512 abuild
osh-native-souffle 9 6 3 8 2,512 abuild
osh-native 10 3 6 8 2,512 abuild
osh-cpython 371 339 32 22 2,512 abuild
dash 8 8 0 2 20,489 configure
bash 32 32 0 3 20,489 configure
osh-native-souffle 41 26 15 20 20,489 configure
osh-native 45 37 8 21 20,489 configure
osh-cpython 1,784 1,747 36 43 20,489 configure
dash 21 21 0 1 69,779 configure-coreutils
bash 79 79 0 3 69,779 configure-coreutils
osh-native-souffle 139 127 12 51 69,779 configure-coreutils
osh-native 145 126 20 50 69,779 configure-coreutils
osh-cpython 5,181 5,100 80 87 69,779 configure-coreutils
bash 5 5 0 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 269 241 28 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 6 6 0 8 1,733 functions
osh-cpython 259 235 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 19 10 10 14 9,661 ltmain.sh
osh-native 22 11 11 15 9,661 ltmain.sh
osh-cpython 843 823 20 29 9,661 ltmain.sh
dash 1 1 0 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 0 4 7 1,679 t4014-format-patch.sh
osh-cpython 103 74 29 19 1,679 t4014-format-patch.sh
dash 1 1 0 1 3,123 t9300-fast-import.sh
osh-native-souffle 4 0 4 7 3,123 t9300-fast-import.sh
osh-native 4 4 0 7 3,123 t9300-fast-import.sh
bash 5 0 5 3 3,123 t9300-fast-import.sh
osh-cpython 106 77 28 19 3,123 t9300-fast-import.sh
bash 15 15 0 3 5,160 test-cmd-util.sh
osh-native-souffle 17 17 0 12 5,160 test-cmd-util.sh
osh-native 18 18 0 12 5,160 test-cmd-util.sh
osh-cpython 771 743 28 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 32,908,099 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,362,827 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,286,839 2,512 abuild
osh-native 44,954,275 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,285,722 20,489 configure
osh-native 275,013,175 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 772,312,538 69,779 configure-coreutils
osh-native 876,674,089 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,493,148 2,029 configure-helper.sh
osh-native 30,468,445 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,805,778 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,738,001 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,251,807 9,661 ltmain.sh
osh-native 112,717,830 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 10,795,611 1,679 t4014-format-patch.sh
osh-native 11,801,833 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 12,658,589 3,123 t9300-fast-import.sh
osh-native 13,861,965 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,254,331 5,160 test-cmd-util.sh
osh-native 111,865,767 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-4fb2cd8b
dash dash-0ebcf347
osh-cpython osh-516f5a34
osh-native osh-e8d6c1d0
osh-native-souffle osh-native-souffle-ac2a03f9
host label host id
no-host no-host-556df3ee

Raw Data

filename
no-host.2025-01-16__22-56-58.cachegrind.tsv
no-host.2025-01-16__22-56-58.times.csv