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 2,771
bash 118,863 703
osh-native-souffle 118,863 461
osh-native 118,863 408
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 1 3 2,698 Build.sh
osh-native-souffle 7 4 3 8 2,698 Build.sh
osh-native 8 7 1 8 2,698 Build.sh
osh-cpython 281 258 23 21 2,698 Build.sh
dash 2 2 0 1 2,512 abuild
bash 6 4 1 3 2,512 abuild
osh-native-souffle 9 7 2 8 2,512 abuild
osh-native 9 6 3 9 2,512 abuild
osh-cpython 387 361 26 22 2,512 abuild
dash 8 7 1 2 20,489 configure
bash 32 32 0 3 20,489 configure
osh-native-souffle 42 32 10 21 20,489 configure
osh-native 46 41 5 21 20,489 configure
osh-cpython 1,834 1,782 52 43 20,489 configure
dash 21 20 1 2 69,779 configure-coreutils
bash 78 77 1 3 69,779 configure-coreutils
osh-native-souffle 143 121 22 51 69,779 configure-coreutils
osh-native 166 146 20 50 69,779 configure-coreutils
osh-cpython 5,285 5,208 77 86 69,779 configure-coreutils
bash 5 4 1 3 2,029 configure-helper.sh
osh-native-souffle 6 2 5 8 2,029 configure-helper.sh
osh-native 7 5 2 8 2,029 configure-helper.sh
osh-cpython 269 248 21 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 7 5 2 8 1,733 functions
osh-cpython 267 244 23 21 1,733 functions
dash 4 2 2 2 9,661 ltmain.sh
bash 17 16 1 4 9,661 ltmain.sh
osh-native-souffle 19 14 5 14 9,661 ltmain.sh
osh-native 21 13 8 15 9,661 ltmain.sh
osh-cpython 877 851 26 29 9,661 ltmain.sh
dash 1 1 1 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 2 3 7 1,679 t4014-format-patch.sh
osh-cpython 103 86 17 19 1,679 t4014-format-patch.sh
dash 1 1 0 1 3,123 t9300-fast-import.sh
osh-native-souffle 4 1 3 7 3,123 t9300-fast-import.sh
osh-native 4 3 1 7 3,123 t9300-fast-import.sh
bash 5 4 1 3 3,123 t9300-fast-import.sh
osh-cpython 110 90 20 19 3,123 t9300-fast-import.sh
bash 15 14 1 3 5,160 test-cmd-util.sh
osh-native-souffle 17 13 3 12 5,160 test-cmd-util.sh
osh-native 19 14 5 12 5,160 test-cmd-util.sh
osh-cpython 777 748 30 27 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 32,959,774 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,592,239 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,367,926 2,512 abuild
osh-native 45,312,971 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,560,320 20,489 configure
osh-native 276,256,572 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 782,334,609 69,779 configure-coreutils
osh-native 880,752,372 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,530,085 2,029 configure-helper.sh
osh-native 30,633,305 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,857,182 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,969,222 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,401,418 9,661 ltmain.sh
osh-native 113,399,487 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 10,808,221 1,679 t4014-format-patch.sh
osh-native 11,857,836 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 12,672,066 3,123 t9300-fast-import.sh
osh-native 13,919,757 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,438,028 5,160 test-cmd-util.sh
osh-native 112,715,057 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-d58ab17f
dash dash-0ebcf347
osh-cpython osh-bfad3c22
osh-native osh-026793b1
osh-native-souffle osh-native-souffle-87eb38f5
host label host id
no-host no-host-e4839999

Raw Data

filename
no-host.2025-02-26__15-29-43.cachegrind.tsv
no-host.2025-02-26__15-29-43.times.csv