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 13.2
osh-native-souffle 118,863 11.6

(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 2,781
bash 118,863 710
osh-native-souffle 118,863 469
osh-native 118,863 449
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 0 2 1 2,698 Build.sh
bash 5 3 2 3 2,698 Build.sh
osh-native-souffle 7 5 2 8 2,698 Build.sh
osh-native 8 3 5 8 2,698 Build.sh
osh-cpython 271 251 20 21 2,698 Build.sh
dash 2 1 1 1 2,512 abuild
bash 5 4 1 3 2,512 abuild
osh-native 9 5 3 8 2,512 abuild
osh-native-souffle 9 6 3 8 2,512 abuild
osh-cpython 365 343 23 21 2,512 abuild
dash 8 7 1 2 20,489 configure
bash 32 29 3 3 20,489 configure
osh-native-souffle 42 36 6 20 20,489 configure
osh-native 43 35 8 21 20,489 configure
osh-cpython 1,785 1,746 39 42 20,489 configure
dash 21 19 2 2 69,779 configure-coreutils
bash 77 77 0 3 69,779 configure-coreutils
osh-native-souffle 140 126 14 51 69,779 configure-coreutils
osh-native 146 124 22 50 69,779 configure-coreutils
osh-cpython 5,282 5,199 82 86 69,779 configure-coreutils
bash 5 3 2 3 2,029 configure-helper.sh
osh-native-souffle 6 4 2 8 2,029 configure-helper.sh
osh-native 7 2 5 8 2,029 configure-helper.sh
osh-cpython 259 233 26 20 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 4 2 7 1,733 functions
osh-native 6 4 2 8 1,733 functions
osh-cpython 252 227 25 20 1,733 functions
dash 4 2 2 2 9,661 ltmain.sh
bash 17 15 1 4 9,661 ltmain.sh
osh-native-souffle 19 14 5 15 9,661 ltmain.sh
osh-native 20 16 4 15 9,661 ltmain.sh
osh-cpython 840 810 30 28 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 4 0 7 1,679 t4014-format-patch.sh
osh-native 4 2 2 7 1,679 t4014-format-patch.sh
osh-cpython 93 71 23 18 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
bash 5 4 1 3 3,123 t9300-fast-import.sh
osh-native 5 1 4 7 3,123 t9300-fast-import.sh
osh-cpython 103 85 18 18 3,123 t9300-fast-import.sh
bash 15 13 2 3 5,160 test-cmd-util.sh
osh-native-souffle 17 11 5 12 5,160 test-cmd-util.sh
osh-native 18 17 1 12 5,160 test-cmd-util.sh
osh-cpython 762 729 33 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 33,374,396 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,906,775 2,698 Build.sh
dash 7,042,147 2,512 abuild
osh-native-souffle 39,410,668 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native 45,784,751 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 244,810,373 20,489 configure
osh-native 279,092,028 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 783,608,664 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native 889,616,316 69,779 configure-coreutils
osh-native-souffle 26,926,212 2,029 configure-helper.sh
osh-native 30,991,166 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 25,250,562 1,733 functions
bash 28,169,399 1,733 functions
osh-native 29,260,970 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 98,838,579 9,661 ltmain.sh
osh-native 114,602,148 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 10,909,253 1,679 t4014-format-patch.sh
osh-native 11,936,074 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 12,809,212 3,123 t9300-fast-import.sh
osh-native 14,042,785 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 98,906,297 5,160 test-cmd-util.sh
osh-native 113,833,743 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-cf075b0c
dash dash-0ebcf347
osh-cpython osh-967ac0f3
osh-native osh-74791e7c
osh-native-souffle osh-native-souffle-f3b68035
host label host id
no-host no-host-e5b8d3ee

Raw Data

filename
no-host.2024-09-26__23-18-50.cachegrind.tsv
no-host.2024-09-26__23-18-50.times.csv