Comments (4)
nigeltao
commented on July 28, 2024
I'm just curious how this particular gif was created.
I'm not 100% confident that I remember the details, but I suspect that it was created by the byzanz tool.
this yields new performance numbers which compare quite favorably
Thanks, but since we all have different hardware, I can't really learn much from these raw numbers without knowing a comparison point (on the same hardware, obviously). For example, numbers for "the old rust" or "wuffs/gif" or "C/giflib". When comparing two different Benchmarketc runs, I use the benchstat program to derive summary statistics (e.g. standard deviations and p-values).
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HeroicKatora
commented on July 28, 2024
Thanks, but since we all have different hardware, I can't really learn much from these raw numbers without knowing a comparison point (on the same hardware, obviously). For example, numbers for "the old rust" or "wuffs/gif" or "C/giflib".
the numbers for gcc -O3 test/c/gif.c && ./a.out -bench:
Benchmarkwuffs_gif_decode_1k_bw/gcc10 200000 1567 ns/op 653.388 MB/s
Benchmarkwuffs_gif_decode_1k_color_full_init/gcc10 100000 5489 ns/op 183.617 MB/s
Benchmarkwuffs_gif_decode_1k_color_part_init/gcc10 100000 4161 ns/op 242.213 MB/s
Benchmarkwuffs_gif_decode_10k_bgra/gcc10 10000 52387 ns/op 769.650 MB/s
Benchmarkwuffs_gif_decode_10k_indexed/gcc10 10000 41503 ns/op 242.873 MB/s
Benchmarkwuffs_gif_decode_20k/gcc10 5000 67273 ns/op 285.401 MB/s
Benchmarkwuffs_gif_decode_100k_artificial/gcc10 1500 219455 ns/op 628.392 MB/s
Benchmarkwuffs_gif_decode_100k_realistic/gcc10 1000 548069 ns/op 251.617 MB/s
Benchmarkwuffs_gif_decode_1000k_full_init/gcc10 100 3924560 ns/op 254.992 MB/s
Benchmarkwuffs_gif_decode_1000k_part_init/gcc10 100 3922270 ns/op 255.141 MB/s
Benchmarkwuffs_gif_decode_anim_screencap/gcc10 100 3348490 ns/op 1389.342 MB/s
Benchmarkwuffs_gif_decode_1k_bw/gcc10 200000 1575 ns/op 650.028 MB/s
Benchmarkwuffs_gif_decode_1k_color_full_init/gcc10 100000 5475 ns/op 184.106 MB/s
Benchmarkwuffs_gif_decode_1k_color_part_init/gcc10 100000 4183 ns/op 240.922 MB/s
Benchmarkwuffs_gif_decode_10k_bgra/gcc10 10000 52488 ns/op 768.163 MB/s
Benchmarkwuffs_gif_decode_10k_indexed/gcc10 10000 41521 ns/op 242.767 MB/s
Benchmarkwuffs_gif_decode_20k/gcc10 5000 67409 ns/op 284.828 MB/s
Benchmarkwuffs_gif_decode_100k_artificial/gcc10 1500 218344 ns/op 631.588 MB/s
Benchmarkwuffs_gif_decode_100k_realistic/gcc10 1000 549226 ns/op 251.087 MB/s
Benchmarkwuffs_gif_decode_1000k_full_init/gcc10 100 3917780 ns/op 255.434 MB/s
Benchmarkwuffs_gif_decode_1000k_part_init/gcc10 100 3929240 ns/op 254.689 MB/s
Benchmarkwuffs_gif_decode_anim_screencap/gcc10 100 3374310 ns/op 1378.710 MB/s
Benchmarkwuffs_gif_decode_1k_bw/gcc10 200000 1561 ns/op 655.825 MB/s
Benchmarkwuffs_gif_decode_1k_color_full_init/gcc10 100000 5495 ns/op 183.422 MB/s
Benchmarkwuffs_gif_decode_1k_color_part_init/gcc10 100000 4154 ns/op 242.633 MB/s
Benchmarkwuffs_gif_decode_10k_bgra/gcc10 10000 52682 ns/op 765.343 MB/s
Benchmarkwuffs_gif_decode_10k_indexed/gcc10 10000 41623 ns/op 242.171 MB/s
Benchmarkwuffs_gif_decode_20k/gcc10 5000 67333 ns/op 285.147 MB/s
Benchmarkwuffs_gif_decode_100k_artificial/gcc10 1500 218626 ns/op 630.775 MB/s
Benchmarkwuffs_gif_decode_100k_realistic/gcc10 1000 547527 ns/op 251.867 MB/s
Benchmarkwuffs_gif_decode_1000k_full_init/gcc10 100 3935070 ns/op 254.311 MB/s
Benchmarkwuffs_gif_decode_1000k_part_init/gcc10 100 3914220 ns/op 255.666 MB/s
Benchmarkwuffs_gif_decode_anim_screencap/gcc10 100 3373890 ns/op 1378.882 MB/s
Benchmarkwuffs_gif_decode_1k_bw/gcc10 200000 1569 ns/op 652.351 MB/s
Benchmarkwuffs_gif_decode_1k_color_full_init/gcc10 100000 5478 ns/op 183.978 MB/s
Benchmarkwuffs_gif_decode_1k_color_part_init/gcc10 100000 4161 ns/op 242.211 MB/s
Benchmarkwuffs_gif_decode_10k_bgra/gcc10 10000 53005 ns/op 760.678 MB/s
Benchmarkwuffs_gif_decode_10k_indexed/gcc10 10000 41800 ns/op 241.147 MB/s
Benchmarkwuffs_gif_decode_20k/gcc10 5000 67582 ns/op 284.098 MB/s
Benchmarkwuffs_gif_decode_100k_artificial/gcc10 1500 218334 ns/op 631.617 MB/s
Benchmarkwuffs_gif_decode_100k_realistic/gcc10 1000 549995 ns/op 250.736 MB/s
Benchmarkwuffs_gif_decode_1000k_full_init/gcc10 100 3917530 ns/op 255.450 MB/s
Benchmarkwuffs_gif_decode_1000k_part_init/gcc10 100 3950690 ns/op 253.306 MB/s
Benchmarkwuffs_gif_decode_anim_screencap/gcc10 100 3356460 ns/op 1386.043 MB/s
Benchmarkwuffs_gif_decode_1k_bw/gcc10 200000 1562 ns/op 655.420 MB/s
Benchmarkwuffs_gif_decode_1k_color_full_init/gcc10 100000 5486 ns/op 183.725 MB/s
Benchmarkwuffs_gif_decode_1k_color_part_init/gcc10 100000 4160 ns/op 242.286 MB/s
Benchmarkwuffs_gif_decode_10k_bgra/gcc10 10000 52965 ns/op 761.255 MB/s
Benchmarkwuffs_gif_decode_10k_indexed/gcc10 10000 41722 ns/op 241.597 MB/s
Benchmarkwuffs_gif_decode_20k/gcc10 5000 67457 ns/op 284.622 MB/s
Benchmarkwuffs_gif_decode_100k_artificial/gcc10 1500 220192 ns/op 626.289 MB/s
Benchmarkwuffs_gif_decode_100k_realistic/gcc10 1000 549098 ns/op 251.146 MB/s
Benchmarkwuffs_gif_decode_1000k_full_init/gcc10 100 3960640 ns/op 252.670 MB/s
Benchmarkwuffs_gif_decode_1000k_part_init/gcc10 100 3916360 ns/op 255.526 MB/s
Benchmarkwuffs_gif_decode_anim_screencap/gcc10 100 3403920 ns/op 1366.717 MB/s
In other words, the performance difference is no longer ×7 but rather ~×2.3.
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HeroicKatora
commented on July 28, 2024
I'm not 100% confident that I remember the details, but I suspect that it was created by the byzanz tool.
Thanks, I'll have a look.
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HeroicKatora
commented on July 28, 2024
Heh, I should just have read your source code... Since you made the same observation but more accurately reported it.
https://github.com/google/wuffs/blob/master/std/gif/decode_gif.wuffs#L889-L906
Sorry for the noice 🙂
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