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

(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 3,673
bash 118,863 971
osh-native 118,863 507
osh-cpython 118,863 16

Per-File Measurements

Time and Memory

shell label elapsed ms user ms sys ms max rss MB num lines filename
dash 1 1 0 2 2,698 Build.sh
bash 4 3 0 3 2,698 Build.sh
osh-native 6 6 0 8 2,698 Build.sh
osh-cpython 199 183 16 20 2,698 Build.sh
dash 1 0 1 2 2,512 abuild
bash 4 4 0 3 2,512 abuild
osh-native 7 7 0 9 2,512 abuild
osh-cpython 272 256 16 21 2,512 abuild
dash 6 3 3 2 20,489 configure
bash 23 23 0 4 20,489 configure
osh-native 36 28 8 21 20,489 configure
osh-cpython 1,315 1,286 28 42 20,489 configure
dash 15 15 0 2 69,779 configure-coreutils
bash 55 55 0 3 69,779 configure-coreutils
osh-native 138 122 16 52 69,779 configure-coreutils
osh-cpython 3,962 3,897 64 86 69,779 configure-coreutils
bash 4 0 4 3 2,029 configure-helper.sh
osh-native 5 0 5 8 2,029 configure-helper.sh
osh-cpython 195 174 20 20 2,029 configure-helper.sh
dash 1 1 0 2 1,733 functions
bash 3 3 0 3 1,733 functions
osh-native 5 5 0 8 1,733 functions
osh-cpython 185 173 12 20 1,733 functions
dash 3 0 3 2 9,661 ltmain.sh
bash 12 8 4 4 9,661 ltmain.sh
osh-native 17 8 8 15 9,661 ltmain.sh
osh-cpython 614 598 16 28 9,661 ltmain.sh
dash 1 1 0 1 1,679 t4014-format-patch.sh
bash 3 3 0 3 1,679 t4014-format-patch.sh
osh-native 3 0 3 7 1,679 t4014-format-patch.sh
osh-cpython 70 65 5 18 1,679 t4014-format-patch.sh
dash 1 1 0 2 3,123 t9300-fast-import.sh
osh-native 3 3 0 7 3,123 t9300-fast-import.sh
bash 3 0 3 3 3,123 t9300-fast-import.sh
osh-cpython 74 50 23 18 3,123 t9300-fast-import.sh
bash 11 11 0 3 5,160 test-cmd-util.sh
osh-native 14 10 3 12 5,160 test-cmd-util.sh
osh-cpython 554 537 16 26 5,160 test-cmd-util.sh

Instruction Counts

shell label irefs num lines filename
dash 6,417,905 2,698 Build.sh
bash 35,933,919 2,698 Build.sh
osh-native 37,952,609 2,698 Build.sh
dash 7,043,427 2,512 abuild
bash 43,752,445 2,512 abuild
osh-native 45,839,376 2,512 abuild
dash 53,264,106 20,489 configure
osh-native 279,206,747 20,489 configure
bash 349,528,134 20,489 configure
dash 151,775,776 69,779 configure-coreutils
bash 886,051,458 69,779 configure-coreutils
osh-native 889,681,839 69,779 configure-coreutils
osh-native 31,038,030 2,029 configure-helper.sh
bash 47,119,656 2,029 configure-helper.sh
dash 4,654,611 1,733 functions
bash 28,153,410 1,733 functions
osh-native 29,305,416 1,733 functions
dash 23,598,849 9,661 ltmain.sh
osh-native 114,671,889 9,661 ltmain.sh
bash 172,845,801 9,661 ltmain.sh
dash 3,168,267 1,679 t4014-format-patch.sh
osh-native 11,979,831 1,679 t4014-format-patch.sh
bash 25,320,150 1,679 t4014-format-patch.sh
dash 4,358,947 3,123 t9300-fast-import.sh
osh-native 14,086,225 3,123 t9300-fast-import.sh
bash 41,145,971 3,123 t9300-fast-import.sh
osh-native 113,914,107 5,160 test-cmd-util.sh
bash 161,991,275 5,160 test-cmd-util.sh

Shell and Host Details

shell label shell id
bash bash-1a09d3b7
dash dash-308ec8e6
osh-cpython osh-2d79797d
osh-native osh-e768872d
host label host id
no-host no-host-bed27d13

Raw Data

filename
no-host.2024-07-20__15-01-50.cachegrind.tsv
no-host.2024-07-20__15-01-50.times.csv