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 2,715
bash 118,863 690
osh-native-souffle 118,863 483
osh-native 118,863 450
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 7 7 0 8 2,698 Build.sh
osh-native-souffle 8 8 0 8 2,698 Build.sh
osh-cpython 276 268 8 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 9 0 8 2,512 abuild
osh-native 10 6 3 8 2,512 abuild
osh-cpython 379 346 32 22 2,512 abuild
dash 8 4 4 2 20,489 configure
bash 32 28 4 3 20,489 configure
osh-native-souffle 40 32 8 20 20,489 configure
osh-native 43 35 8 21 20,489 configure
osh-cpython 1,762 1,745 16 43 20,489 configure
dash 21 21 0 1 69,779 configure-coreutils
bash 81 81 0 3 69,779 configure-coreutils
osh-native-souffle 135 98 37 51 69,779 configure-coreutils
osh-native 145 117 28 50 69,779 configure-coreutils
osh-cpython 5,189 5,128 60 86 69,779 configure-coreutils
bash 6 5 0 3 2,029 configure-helper.sh
osh-native-souffle 6 3 3 8 2,029 configure-helper.sh
osh-native 6 6 0 8 2,029 configure-helper.sh
osh-cpython 270 242 28 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 3 3 8 1,733 functions
osh-native 6 6 0 8 1,733 functions
osh-cpython 258 226 32 21 1,733 functions
dash 4 4 0 2 9,661 ltmain.sh
bash 17 12 4 4 9,661 ltmain.sh
osh-native-souffle 19 11 7 14 9,661 ltmain.sh
osh-native 20 20 0 15 9,661 ltmain.sh
osh-cpython 839 806 32 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 101 84 16 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 0 4 8 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 16 6 10 12 5,160 test-cmd-util.sh
osh-native 18 13 4 12 5,160 test-cmd-util.sh
osh-cpython 762 729 33 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 32,908,162 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,362,890 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,286,902 2,512 abuild
osh-native 44,954,337 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,285,755 20,489 configure
osh-native 275,013,238 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 772,312,571 69,779 configure-coreutils
osh-native 876,674,151 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,493,211 2,029 configure-helper.sh
osh-native 30,468,508 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,805,841 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,738,064 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,251,870 9,661 ltmain.sh
osh-native 112,717,894 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 10,795,674 1,679 t4014-format-patch.sh
osh-native 11,801,896 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 12,658,652 3,123 t9300-fast-import.sh
osh-native 13,862,028 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,254,394 5,160 test-cmd-util.sh
osh-native 111,865,830 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-3fe864de
dash dash-0ebcf347
osh-cpython osh-2423e421
osh-native osh-bca22c49
osh-native-souffle osh-native-souffle-9727632e
host label host id
no-host no-host-556df3ee

Raw Data

filename
no-host.2025-01-06__00-19-53.cachegrind.tsv
no-host.2025-01-06__00-19-53.times.csv