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 11.5

(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 2,802
bash 118,863 720
osh-native-souffle 118,863 491
osh-native 118,863 454
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 7 7 0 8 2,698 Build.sh
osh-cpython 270 241 28 22 2,698 Build.sh
dash 2 2 0 1 2,512 abuild
bash 5 5 0 3 2,512 abuild
osh-native-souffle 9 9 0 8 2,512 abuild
osh-native 9 9 0 9 2,512 abuild
osh-cpython 359 323 36 22 2,512 abuild
dash 8 8 0 2 20,489 configure
bash 31 31 0 3 20,489 configure
osh-native-souffle 38 34 4 20 20,489 configure
osh-native 45 36 8 21 20,489 configure
osh-cpython 1,764 1,723 40 43 20,489 configure
dash 20 16 4 2 69,779 configure-coreutils
bash 77 73 4 3 69,779 configure-coreutils
osh-native-souffle 136 104 32 51 69,779 configure-coreutils
osh-native 142 118 24 50 69,779 configure-coreutils
osh-cpython 5,049 4,968 81 87 69,779 configure-coreutils
bash 5 5 0 3 2,029 configure-helper.sh
osh-native-souffle 6 6 0 8 2,029 configure-helper.sh
osh-native 6 3 3 8 2,029 configure-helper.sh
osh-cpython 255 234 20 21 2,029 configure-helper.sh
dash 1 1 0 1 1,733 functions
bash 4 4 0 3 1,733 functions
osh-native-souffle 6 0 6 8 1,733 functions
osh-native 7 7 0 8 1,733 functions
osh-cpython 242 222 20 21 1,733 functions
dash 4 4 0 2 9,661 ltmain.sh
bash 16 8 8 4 9,661 ltmain.sh
osh-native-souffle 17 14 3 15 9,661 ltmain.sh
osh-native 20 20 0 15 9,661 ltmain.sh
osh-cpython 806 765 40 29 9,661 ltmain.sh
dash 1 1 0 1 1,679 t4014-format-patch.sh
bash 3 0 3 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 101 84 17 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 104 88 16 19 3,123 t9300-fast-import.sh
bash 14 11 4 3 5,160 test-cmd-util.sh
osh-native-souffle 16 16 0 12 5,160 test-cmd-util.sh
osh-native 18 11 7 12 5,160 test-cmd-util.sh
osh-cpython 740 710 29 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 32,911,005 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,365,808 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,291,386 2,512 abuild
osh-native 44,957,326 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,293,972 20,489 configure
osh-native 275,020,150 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 781,457,041 69,779 configure-coreutils
osh-native 876,680,588 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,495,060 2,029 configure-helper.sh
osh-native 30,470,506 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,807,782 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,739,950 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,255,581 9,661 ltmain.sh
osh-native 112,722,612 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 10,796,401 1,679 t4014-format-patch.sh
osh-native 11,802,997 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 12,659,849 3,123 t9300-fast-import.sh
osh-native 13,863,110 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,259,422 5,160 test-cmd-util.sh
osh-native 111,879,606 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-18ce232b
dash dash-0ebcf347
osh-cpython osh-47b10e8f
osh-native osh-e1d5b2a0
osh-native-souffle osh-native-souffle-8e8f82cf
host label host id
no-host no-host-556df3ee

Raw Data

filename
no-host.2025-02-24__00-55-04.cachegrind.tsv
no-host.2025-02-24__00-55-04.times.csv