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 2,726
bash 118,863 699
osh-native-souffle 118,863 470
osh-native 118,863 436
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 4 4 8 2,698 Build.sh
osh-native 8 4 4 8 2,698 Build.sh
osh-cpython 287 269 17 21 2,698 Build.sh
dash 2 0 2 1 2,512 abuild
bash 5 5 0 3 2,512 abuild
osh-native-souffle 9 4 4 8 2,512 abuild
osh-native 9 4 4 9 2,512 abuild
osh-cpython 372 351 20 22 2,512 abuild
dash 8 8 0 2 20,489 configure
bash 32 32 0 3 20,489 configure
osh-native-souffle 40 20 20 21 20,489 configure
osh-native 43 35 8 21 20,489 configure
osh-cpython 1,790 1,761 28 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 141 104 36 51 69,779 configure-coreutils
osh-native 152 128 24 50 69,779 configure-coreutils
osh-cpython 5,310 5,237 72 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 7 3 3 8 2,029 configure-helper.sh
osh-cpython 262 234 28 21 2,029 configure-helper.sh
dash 1 1 0 1 1,733 functions
bash 4 0 4 3 1,733 functions
osh-native-souffle 7 3 3 8 1,733 functions
osh-native 7 7 0 8 1,733 functions
osh-cpython 256 239 16 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 19 0 15 9,661 ltmain.sh
osh-native 21 12 8 15 9,661 ltmain.sh
osh-cpython 844 807 36 29 9,661 ltmain.sh
dash 1 0 1 1 1,679 t4014-format-patch.sh
bash 3 3 0 3 1,679 t4014-format-patch.sh
osh-native-souffle 4 4 0 7 1,679 t4014-format-patch.sh
osh-native 4 0 4 7 1,679 t4014-format-patch.sh
osh-cpython 100 80 20 19 1,679 t4014-format-patch.sh
dash 1 1 0 1 3,123 t9300-fast-import.sh
osh-native-souffle 4 4 0 7 3,123 t9300-fast-import.sh
osh-native 4 4 0 8 3,123 t9300-fast-import.sh
bash 5 5 0 3 3,123 t9300-fast-import.sh
osh-cpython 112 96 15 19 3,123 t9300-fast-import.sh
bash 15 15 0 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 778 745 32 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 32,911,749 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,366,912 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,292,195 2,512 abuild
osh-native 44,957,937 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,295,734 20,489 configure
osh-native 275,022,498 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 781,456,133 69,779 configure-coreutils
osh-native 876,680,940 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,495,823 2,029 configure-helper.sh
osh-native 30,471,496 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,808,368 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,740,893 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,256,667 9,661 ltmain.sh
osh-native 112,722,832 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 10,798,656 1,679 t4014-format-patch.sh
osh-native 11,805,389 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 12,661,834 3,123 t9300-fast-import.sh
osh-native 13,865,303 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,262,931 5,160 test-cmd-util.sh
osh-native 111,880,912 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-2a307764
dash dash-0ebcf347
osh-cpython osh-1ce5a5ee
osh-native osh-7795e79c
osh-native-souffle osh-native-souffle-063e8ae1
host label host id
no-host no-host-556df3ee

Raw Data

filename
no-host.2025-02-23__11-01-39.cachegrind.tsv
no-host.2025-02-23__11-01-39.times.csv