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FontTemplateData gets passed over IPC during the communication between FontContext and FontCacheThread. Serializing and deserializing these bytes is expensive, so this change ensures that we only do that when the bytes can't be read from disk. A similar strategy is already used on macos and windows. The performance problem was particularly noticeable after implenting font fallback, where the content process would potentially work through a list of fonts, trying to find one which contains a certain glyph. That could result in lots of font bytes going over IPC. |
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| .. | ||
| freetype | ||
| macos | ||
| windows | ||
| mod.rs | ||