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 2,644
bash 118,863 684
osh-native-souffle 118,863 412
osh-native 118,863 398
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 8 8 0 8 2,698 Build.sh
osh-native 9 8 0 8 2,698 Build.sh
osh-cpython 278 250 28 21 2,698 Build.sh
dash 2 2 0 1 2,512 abuild
bash 6 6 0 3 2,512 abuild
osh-native-souffle 10 10 0 8 2,512 abuild
osh-native 10 10 0 9 2,512 abuild
osh-cpython 384 356 28 22 2,512 abuild
dash 9 9 0 2 20,489 configure
bash 33 33 0 3 20,489 configure
osh-native-souffle 46 34 11 20 20,489 configure
osh-native 47 36 12 21 20,489 configure
osh-cpython 1,853 1,828 24 43 20,489 configure
dash 21 21 0 2 69,779 configure-coreutils
bash 79 79 0 3 69,779 configure-coreutils
osh-native-souffle 165 145 20 51 69,779 configure-coreutils
osh-native 168 152 16 50 69,779 configure-coreutils
osh-cpython 5,346 5,253 92 86 69,779 configure-coreutils
bash 6 3 3 3 2,029 configure-helper.sh
osh-native-souffle 6 6 0 8 2,029 configure-helper.sh
osh-native 8 4 4 9 2,029 configure-helper.sh
osh-cpython 280 254 25 21 2,029 configure-helper.sh
dash 2 2 0 1 1,733 functions
bash 4 0 4 3 1,733 functions
osh-native-souffle 6 6 0 8 1,733 functions
osh-native 7 3 3 8 1,733 functions
osh-cpython 267 245 21 21 1,733 functions
dash 4 4 0 2 9,661 ltmain.sh
bash 18 11 7 4 9,661 ltmain.sh
osh-native-souffle 21 17 4 14 9,661 ltmain.sh
osh-native 22 15 7 15 9,661 ltmain.sh
osh-cpython 877 840 36 29 9,661 ltmain.sh
dash 1 1 0 1 1,679 t4014-format-patch.sh
bash 4 4 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 109 83 25 19 1,679 t4014-format-patch.sh
dash 1 1 0 1 3,123 t9300-fast-import.sh
osh-native-souffle 5 0 5 7 3,123 t9300-fast-import.sh
bash 5 5 0 3 3,123 t9300-fast-import.sh
osh-native 5 5 0 7 3,123 t9300-fast-import.sh
osh-cpython 111 78 33 19 3,123 t9300-fast-import.sh
bash 15 10 5 3 5,160 test-cmd-util.sh
osh-native-souffle 18 9 9 11 5,160 test-cmd-util.sh
osh-native 19 11 8 12 5,160 test-cmd-util.sh
osh-cpython 784 756 28 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 32,897,616 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,368,312 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,294,259 2,512 abuild
osh-native 44,959,830 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,300,390 20,489 configure
osh-native 275,026,198 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 781,463,997 69,779 configure-coreutils
osh-native 876,688,420 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,496,932 2,029 configure-helper.sh
osh-native 30,472,522 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,809,654 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,741,954 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,258,450 9,661 ltmain.sh
osh-native 112,725,546 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 10,797,789 1,679 t4014-format-patch.sh
osh-native 11,804,480 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 12,661,221 3,123 t9300-fast-import.sh
osh-native 13,864,626 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,262,408 5,160 test-cmd-util.sh
osh-native 111,883,052 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-c17df513
dash dash-0ebcf347
osh-cpython osh-5a628405
osh-native osh-dc3d74c2
osh-native-souffle osh-native-souffle-8bb5bfc7
host label host id
no-host no-host-556df3ee

Raw Data

filename
no-host.2025-02-18__10-53-43.cachegrind.tsv
no-host.2025-02-18__10-53-43.times.csv