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 3,811
bash 118,863 980
osh-native 118,863 521
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 0 1 2 2,698 Build.sh
bash 3 3 0 3 2,698 Build.sh
osh-native 6 6 0 8 2,698 Build.sh
osh-cpython 194 186 8 21 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 266 253 12 21 2,512 abuild
dash 6 6 0 2 20,489 configure
bash 23 23 0 4 20,489 configure
osh-native 37 29 8 21 20,489 configure
osh-cpython 1,372 1,351 20 42 20,489 configure
dash 15 15 0 2 69,779 configure-coreutils
bash 56 52 4 3 69,779 configure-coreutils
osh-native 131 94 37 50 69,779 configure-coreutils
osh-cpython 3,956 3,862 92 86 69,779 configure-coreutils
bash 4 4 0 3 2,029 configure-helper.sh
osh-native 5 5 0 8 2,029 configure-helper.sh
osh-cpython 189 165 23 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 186 177 8 20 1,733 functions
dash 3 3 0 2 9,661 ltmain.sh
bash 12 12 0 4 9,661 ltmain.sh
osh-native 17 8 8 15 9,661 ltmain.sh
osh-cpython 627 627 0 28 9,661 ltmain.sh
dash 1 1 0 2 1,679 t4014-format-patch.sh
bash 3 3 0 3 1,679 t4014-format-patch.sh
osh-native 3 3 0 7 1,679 t4014-format-patch.sh
osh-cpython 69 61 8 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 3 0 3 3,123 t9300-fast-import.sh
osh-cpython 75 63 12 18 3,123 t9300-fast-import.sh
bash 11 11 0 3 5,160 test-cmd-util.sh
osh-native 14 14 0 12 5,160 test-cmd-util.sh
osh-cpython 553 516 36 27 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 37,968,048 2,698 Build.sh
dash 7,043,427 2,512 abuild
bash 43,752,445 2,512 abuild
osh-native 45,850,478 2,512 abuild
dash 53,264,106 20,489 configure
osh-native 279,244,802 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 889,927,837 69,779 configure-coreutils
osh-native 31,047,363 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 29,316,865 1,733 functions
dash 23,598,849 9,661 ltmain.sh
osh-native 114,687,683 9,661 ltmain.sh
bash 172,845,801 9,661 ltmain.sh
dash 3,168,267 1,679 t4014-format-patch.sh
osh-native 11,985,111 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 14,091,365 3,123 t9300-fast-import.sh
bash 41,145,971 3,123 t9300-fast-import.sh
osh-native 113,939,999 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-527bdb69
dash dash-308ec8e6
osh-cpython osh-69770afe
osh-native osh-d54faa76
host label host id
no-host no-host-bed27d13

Raw Data

filename
no-host.2024-08-26__23-31-25.cachegrind.tsv
no-host.2024-08-26__23-31-25.times.csv