IOS 7.1.0 startup time slower than 6.5.4
还没有人认领这个 Issue。
评估
- 难度
- 5/5
- 预计耗时
- 一周以上
- 新手友好度
- 20/100
- Issue 类型
- 缺陷
- 描述清晰度
- 基本清楚
- 活跃度
- 停滞
- 技术栈
- ios, javascript
调研方向
从链接的 ns-performance-test 仓库开始，比较 iOS 7.1.0 与 6.5.4 的启动性能分析，包括 release 标志和 codecache 场景。当启动和 CPU 回归问题被识别并解决或得到明确解释，同时后续的应用加载也经过检查后，该 issue 才算完成。
由索引模型根据 Issue 内容生成。
描述
With the release of 7.1.0, we've finally been able to test our mobile app on ios-v8. We've found that the startup is significantly slower, to the point that if we start our app via push, apple may kill it due to it taking too long.
My coworker has made a test repo showing this difference, along with much higher CPU usage: https://github.com/IanNMarshall/ns-performance-test
Without any flags (uglify, release, etc.) here is the startup time difference using Time Profiler:
And using release flags:
The times are close, but in our app (and likely anything larger than a demo), the difference grows:
I hope we are just missing something, as I was really hoping to see a significant boost across the board moving to v8. Our tests included codecache, and I'm aware the first startup is meant to be slower in that case, the slowness persists to subsequent app loads as well.
- 主要语言
- JavaScript
- 星标
- 150
- 派生
- 43
- 平均合并
- 3 天 10 小时
- 30 天内合并 PR
- 22
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