benchmark against ttf-parser

[ebraminio]

# first install rustc from your package manager, if you have it from rustup or anything well that's even better
meson build -Dexperimental_api=true -Doptimization=2
ninja -Cbuild
build/perf/perf

ttf-parser's extents calculates costly for variable font's when there is no actual coordinates so needs some tweaks, RazrFalcon/ttf-parser#28 and RazrFalcon/ttf-parser#27 to become comparable, it is still comparable when coordinate are given (/vf cases) and specially in CFF/CFF2

rustybuzz is a gradual port of harfbuzz to rust https://github.com/RazrFalcon/rustybuzz that now doesn't have glyph related part of our font parsing logics still runs our test suite thanks to ttf-parser.

things can be improved on ot-draw if path command 'sanitization' be removed.

picked up from https://circleci.com/gh/harfbuzz/harfbuzz/146188 "build/perf/perf && rm -rf build" section

---------------------------------------------------------------------------------------
Benchmark                                                Time           CPU Iterations
---------------------------------------------------------------------------------------
shape/fa-thelittleprince.txt - Amiri             122202682 ns  122183608 ns          5
shape/fa-thelittleprince.txt - NotoNastaliqUrdu  423983455 ns  423303848 ns          2
shape/fa-monologue.txt - Amiri                    20740165 ns   20382469 ns         34
shape/fa-monologue.txt - NotoNastaliqUrdu         74148273 ns   72333353 ns         10
shape/en-thelittleprince.txt - Roboto             64665055 ns   64377800 ns         10
shape/en-words.txt - Roboto                       75118780 ns   75024550 ns          8
extents/cff - ot - SourceSansPro                   5066222 ns    5064483 ns        134
extents/cff - ft - SourceSansPro                  11262572 ns   11232289 ns         66
extents/cff - tp - SourceSansPro                   2393903 ns    2393362 ns        292
extents/cff2 - ot - AdobeVFPrototype               5247237 ns    5206772 ns        132
extents/cff2 - ft - AdobeVFPrototype               3980850 ns    3979831 ns        179
extents/cff2 - tp - AdobeVFPrototype               2057811 ns    2057536 ns        346
extents/cff2/vf - ot - AdobeVFPrototype            5376816 ns    5299965 ns        100
extents/cff2/vf - ft - AdobeVFPrototype            4078521 ns    4074512 ns        172
extents/cff2/vf - tp - AdobeVFPrototype            2067422 ns    2041259 ns        350
extents/glyf - ot - SourceSerifVariable              50883 ns      50699 ns      12265
extents/glyf - ft - SourceSerifVariable            1663266 ns    1643066 ns        414
extents/glyf - tp - SourceSerifVariable            3873030 ns    3871871 ns        185
extents/glyf/vf - ot - SourceSerifVariable         6347738 ns    6312792 ns        108
extents/glyf/vf - ft - SourceSerifVariable         5716778 ns    5708774 ns        125
extents/glyf/vf - tp - SourceSerifVariable         6615693 ns    6532585 ns        122
extents/glyf - ot - Comfortaa                        33474 ns      33208 ns      21543
extents/glyf - ft - Comfortaa                       984342 ns     979308 ns        752
extents/glyf - tp - Comfortaa                      2399276 ns    2359676 ns        296
extents/glyf/vf - ot - Comfortaa                   3891430 ns    3889872 ns        177
extents/glyf/vf - ft - Comfortaa                   3316384 ns    3312605 ns        222
extents/glyf/vf - tp - Comfortaa                   4251239 ns    4243509 ns        164
extents/glyf - ot - Roboto                           45450 ns      45394 ns      15424
extents/glyf - ft - Roboto                         1166475 ns    1160516 ns        589
extents/glyf - tp - Roboto                           32090 ns      31966 ns      21862
draw/cff - ot - SourceSansPro                      6382060 ns    6381087 ns        103
draw/cff - ft - SourceSansPro                     11149430 ns   11136182 ns         61
draw/cff - tp - SourceSansPro                      2473528 ns    2458573 ns        288
draw/cff2 - ot - AdobeVFPrototype                  5159724 ns    5132608 ns        131
draw/cff2 - ft - AdobeVFPrototype                  3943370 ns    3920704 ns        180
draw/cff2 - tp - AdobeVFPrototype                  2059765 ns    2047303 ns        335
draw/cff2/vf - ot - AdobeVFPrototype               5527324 ns    5501692 ns        127
draw/cff2/vf - ft - AdobeVFPrototype               4111966 ns    4111240 ns        172
draw/cff2/vf - tp - AdobeVFPrototype               2077378 ns    2074750 ns        338
draw/glyf - ot - SourceSerifVariable               4443270 ns    4442628 ns        155
draw/glyf - ft - SourceSerifVariable               1629466 ns    1629228 ns        434
draw/glyf - tp - SourceSerifVariable               3906841 ns    3906258 ns        177
draw/glyf/vf - ot - SourceSerifVariable            8061347 ns    7959191 ns         84
draw/glyf/vf - ft - SourceSerifVariable            5451965 ns    5450260 ns        125
draw/glyf/vf - tp - SourceSerifVariable            6299210 ns    6265153 ns        105
draw/glyf - ot - Comfortaa                         2722454 ns    2722034 ns        257
draw/glyf - ft - Comfortaa                          977256 ns     960065 ns        719
draw/glyf - tp - Comfortaa                         2398904 ns    2396771 ns        278
draw/glyf/vf - ot - Comfortaa                      5024540 ns    5023935 ns        100
draw/glyf/vf - ft - Comfortaa                      3331846 ns    3290786 ns        207
draw/glyf/vf - tp - Comfortaa                      4346116 ns    4319098 ns        166
draw/glyf - ot - Roboto                            2602575 ns    2596758 ns        269
draw/glyf - ft - Roboto                            1144549 ns    1143878 ns        609
draw/glyf - tp - Roboto                            1243036 ns    1240433 ns        555

[ebraminio]

let's close till we agree on benchmarking needs and so and c-api becomes a no_std also, otherwise can be considered useful I guess.

[behdad]

What column is which? This is very bad way to present perf results. I know we follow up and fix in the other issue. Just saying. :-)

c-api becomes a no_std also

Huh?

[ebraminio]

c-api becomes a no_std also
Huh?

Oh, c-api wrapper of ttf-parser has dependency to Rust's standard library as RazrFalcon/ttf-parser#29 however ttf-parser's Rust core doesn't need Rust's standard library unlike its c wrapper which can be fixed.

[ebraminio]

What column is which? This is very bad way to present perf results. I know we follow up and fix in the other issue. Just saying. :-)

Absolutely! Feel free to give me feedback on it! Even better, having a look at its source https://github.com/harfbuzz/harfbuzz/blob/master/perf/perf-extents.hh#L43-L65