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 2,775
bash 118,863 682
osh-native-souffle 118,863 465
osh-native 118,863 430
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 3 2 3 2,698 Build.sh
osh-native-souffle 7 6 1 8 2,698 Build.sh
osh-native 8 7 1 8 2,698 Build.sh
osh-cpython 281 260 21 21 2,698 Build.sh
dash 2 1 1 1 2,512 abuild
bash 6 5 1 3 2,512 abuild
osh-native-souffle 8 6 2 8 2,512 abuild
osh-native 9 5 4 8 2,512 abuild
osh-cpython 375 346 29 22 2,512 abuild
dash 8 6 2 2 20,489 configure
bash 32 30 2 3 20,489 configure
osh-native-souffle 41 31 10 21 20,489 configure
osh-native 44 37 7 21 20,489 configure
osh-cpython 1,824 1,790 33 43 20,489 configure
dash 21 21 0 1 69,779 configure-coreutils
bash 77 75 2 3 69,779 configure-coreutils
osh-native-souffle 144 120 24 49 69,779 configure-coreutils
osh-native 156 137 19 50 69,779 configure-coreutils
osh-cpython 5,334 5,244 87 86 69,779 configure-coreutils
osh-native-souffle 6 3 3 8 2,029 configure-helper.sh
osh-native 7 2 4 8 2,029 configure-helper.sh
bash 10 8 2 3 2,029 configure-helper.sh
osh-cpython 270 246 24 21 2,029 configure-helper.sh
dash 1 1 0 1 1,733 functions
bash 4 3 1 3 1,733 functions
osh-native-souffle 6 2 4 8 1,733 functions
osh-native 6 4 2 8 1,733 functions
osh-cpython 261 231 29 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 16 3 15 9,661 ltmain.sh
osh-native 20 15 5 15 9,661 ltmain.sh
osh-cpython 832 803 29 29 9,661 ltmain.sh
dash 1 1 0 1 1,679 t4014-format-patch.sh
bash 3 2 1 3 1,679 t4014-format-patch.sh
osh-native-souffle 4 3 1 7 1,679 t4014-format-patch.sh
osh-native 4 0 4 7 1,679 t4014-format-patch.sh
osh-cpython 105 79 26 19 1,679 t4014-format-patch.sh
dash 1 1 0 1 3,123 t9300-fast-import.sh
osh-native-souffle 4 2 2 7 3,123 t9300-fast-import.sh
osh-native 4 1 3 7 3,123 t9300-fast-import.sh
bash 5 3 2 3 3,123 t9300-fast-import.sh
osh-cpython 109 94 15 19 3,123 t9300-fast-import.sh
bash 15 14 1 3 5,160 test-cmd-util.sh
osh-native-souffle 17 12 4 12 5,160 test-cmd-util.sh
osh-native 18 16 2 12 5,160 test-cmd-util.sh
osh-cpython 768 742 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 32,959,160 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,596,534 2,698 Build.sh
dash 7,042,147 2,512 abuild
osh-native-souffle 38,795,506 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native 45,317,998 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,624,115 20,489 configure
osh-native 276,266,745 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 782,415,410 69,779 configure-coreutils
osh-native 880,768,363 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,540,056 2,029 configure-helper.sh
osh-native 30,636,829 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,865,287 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,972,501 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,420,867 9,661 ltmain.sh
osh-native 113,405,204 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 10,811,710 1,679 t4014-format-patch.sh
osh-native 11,861,062 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 12,675,820 3,123 t9300-fast-import.sh
osh-native 13,923,093 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,464,924 5,160 test-cmd-util.sh
osh-native 112,723,959 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-10feb361
dash dash-0ebcf347
osh-cpython osh-bd7a54f5
osh-native osh-1bfb0c0e
osh-native-souffle osh-native-souffle-33cc801f
host label host id
no-host no-host-e4839999

Raw Data

filename
no-host.2025-03-09__03-25-17.cachegrind.tsv
no-host.2025-03-09__03-25-17.times.csv