a-b-street/abstreet

Smaller files: don't serialize turn geometry?

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#94 创建于 2020年6月24日

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 (5 评论) (1 反应) (0 负责人)Rust (6,779 star) (256 fork)batch import
good first issue

描述

Not sure this will work, but it's a good little exploratory project. map_model/src/turn.rs stores geom: PolyLine. Last time I used the serialized_size_bytes stuff in map.rs, these polylines constituted a huge part of the binary map files. The release size is slowly growing, so it'd be nice to trim this down.

Maybe we could skip serializing the PolyLine, then in Map::new after deserializing, go fill it in again. Should measure the impact on file sizes and initial map loading time.

贡献者指南

技术栈
rust
领域
performancedata
议题类型
performance
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
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1-3 hours
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stale
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clear
前置要求
Rust programmingSerde serializationmap model structure
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
60
研究方向
Explore the serialization of PolyLine in map model/src/turn.rs. Measure the size impact using serialized size bytes in map.rs. Implement skipping serialization of the PolyLine field and regenerate it in Map::new. Test file size and loading time changes.