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pcwalton's profile
Patrick Walton
Patrick Walton
Patrick Walton
@pcwalton

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Patrick Walton

@pcwalton

Research engineer at Mozilla

San Francisco, CA
pcwalton.github.io
Joined November 2009

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    Patrick Walton‏ @pcwalton Apr 22
    • Report Tweet
    • Report NetzDG Violation

    Here’s a massive Dutch rail map benchmark with 67K vector paths. After spending 32 seconds loading the SVG (resvg had to be hacked to remove quadratic blowup or it would never finish) Pathfinder renders this in 245 ms. Cairo takes 39.5 *seconds*, not including load time.pic.twitter.com/5nMWf1jOr0

    11:20 AM - 22 Apr 2020
    • 36 Retweets
    • 344 Likes
    • Daniel Schaefer Ivan Erceg Joe Ling Thomas Villa Sergio Varela 🌾 Marek Raida Nico Sneck tobin 🁼🂉ノ(ಠ_ಠノ) œ Jacob Chapman
    13 replies 36 retweets 344 likes
      1. New conversation
      2. mr. waddlesplash‏ @waddlesplash Apr 22
        • Report Tweet
        • Report NetzDG Violation
        Replying to @pcwalton

        How about with CPU only rendering? How does it stack up against Cairo there?

        1 reply 0 retweets 1 like
      3. Patrick Walton‏ @pcwalton Apr 22
        • Report Tweet
        • Report NetzDG Violation
        Replying to @waddlesplash

        I don’t have a CPU renderer for Pathfinder implemented yet.

        2 replies 0 retweets 1 like
      4. 3 more replies
      1. New conversation
      2. FedericoMenaQuintero‏ @federicomena Apr 22
        • Report Tweet
        • Report NetzDG Violation
        Replying to @pcwalton

        That seems... off? Here, rsvg-convert takes 5.70 secs for the SVG with <text>, 10.9 secs for the SVG with text converted to <path>. Cairo-only at the default size, 3610x4159 pixels.

        1 reply 0 retweets 0 likes
      3. Patrick Walton‏ @pcwalton Apr 22
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        Replying to @federicomena

        I used resvg for the test, which converts text to path. 10-40 s seems maybe in line with CPU differences?

        1 reply 0 retweets 1 like
      4. 3 more replies
      1. New conversation
      2. Johan Andersson  🦀‏ @repi Apr 22
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        Replying to @pcwalton

        awesome! btw is that CPU vs GPU time balance typical for complex models with pathfinder? i.e. 10x the CPU time over GPU time?

        1 reply 0 retweets 1 like
      3. Patrick Walton‏ @pcwalton Apr 22
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        Replying to @repi

        Unfortunately, yeah. Most of the time goes into allocating/building vertex buffers. @raphlinus’ work (and Massively Parallel Vector Graphics) shows how this can be moved to the GPU with compute shader, which I’d like to do eventually where available, but I need a CPU fallback.

        3 replies 0 retweets 11 likes
      4. 1 more reply
      1. New conversation
      2. Ted Mielczarek‏ @TedMielczarek Apr 22
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        Replying to @pcwalton

        Do you still hit driver bugs with Pathfinder or have you found a model that works around that sort of thing?

        1 reply 0 retweets 3 likes
      3. Patrick Walton‏ @pcwalton Apr 22
        • Report Tweet
        • Report NetzDG Violation
        Replying to @TedMielczarek

        I sure do. :\ https://github.com/servo/pathfinder/issues/300 … I just work around them individually when I find them…

        0 replies 0 retweets 4 likes
      4. End of conversation
      1. New conversation
      2. Ikbel‏ @boulabiar Apr 22
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        Replying to @pcwalton

        How can other applications like Inkscape or other C, C++ ones benefit from this project? Is it difficult to integrate Pathfinder?

        1 reply 0 retweets 1 like
      3. Patrick Walton‏ @pcwalton Apr 22
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        Replying to @boulabiar

        There’s a C API and an example of using it, so it shouldn’t be hard. Note that the C API is currently a bit incomplete (patches welcome!)

        0 replies 0 retweets 3 likes
      4. End of conversation

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