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 2,700
bash 118,863 708
osh-native-souffle 118,863 483
osh-native 118,863 455
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 0 7 8 2,698 Build.sh
osh-native 8 8 0 8 2,698 Build.sh
osh-cpython 279 254 25 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 9 9 0 8 2,512 abuild
osh-cpython 371 339 32 22 2,512 abuild
dash 9 8 0 2 20,489 configure
bash 32 28 4 4 20,489 configure
osh-native-souffle 41 37 4 20 20,489 configure
osh-native 43 43 0 21 20,489 configure
osh-cpython 1,815 1,799 16 43 20,489 configure
dash 21 21 0 1 69,779 configure-coreutils
bash 77 72 4 3 69,779 configure-coreutils
osh-native-souffle 134 114 20 51 69,779 configure-coreutils
osh-native 142 110 31 50 69,779 configure-coreutils
osh-cpython 5,182 5,125 56 86 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 6 0 6 9 2,029 configure-helper.sh
osh-cpython 272 243 28 21 2,029 configure-helper.sh
dash 1 0 1 1 1,733 functions
bash 4 4 0 3 1,733 functions
osh-native-souffle 6 6 0 8 1,733 functions
osh-native 6 3 3 8 1,733 functions
osh-cpython 257 237 20 21 1,733 functions
dash 4 4 0 2 9,661 ltmain.sh
bash 17 13 3 4 9,661 ltmain.sh
osh-native-souffle 19 11 7 14 9,661 ltmain.sh
osh-native 20 16 4 15 9,661 ltmain.sh
osh-cpython 843 814 29 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 4 0 7 1,679 t4014-format-patch.sh
osh-native 4 0 4 7 1,679 t4014-format-patch.sh
osh-cpython 102 85 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 7 3,123 t9300-fast-import.sh
bash 5 5 0 3 3,123 t9300-fast-import.sh
osh-cpython 107 95 12 19 3,123 t9300-fast-import.sh
bash 15 15 0 3 5,160 test-cmd-util.sh
osh-native-souffle 16 4 12 12 5,160 test-cmd-util.sh
osh-native 17 17 0 12 5,160 test-cmd-util.sh
osh-cpython 766 761 4 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 32,908,129 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,362,857 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,286,869 2,512 abuild
osh-native 44,954,304 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,285,722 20,489 configure
osh-native 275,013,205 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 772,312,538 69,779 configure-coreutils
osh-native 876,674,118 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,493,178 2,029 configure-helper.sh
osh-native 30,468,505 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,805,808 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,738,061 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,251,837 9,661 ltmain.sh
osh-native 112,717,860 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 10,795,641 1,679 t4014-format-patch.sh
osh-native 11,801,893 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 12,658,619 3,123 t9300-fast-import.sh
osh-native 13,861,995 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,254,361 5,160 test-cmd-util.sh
osh-native 111,865,797 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-e1fe7c3f
dash dash-0ebcf347
osh-cpython osh-7b5679ee
osh-native osh-4b768a6b
osh-native-souffle osh-native-souffle-b5cdd4b5
host label host id
no-host no-host-556df3ee

Raw Data

filename
no-host.2025-01-17__23-02-38.cachegrind.tsv
no-host.2025-01-17__23-02-38.times.csv