<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>性能追踪 on Text Matrix</title><link>https://txtmix.com/tags/%E6%80%A7%E8%83%BD%E8%BF%BD%E8%B8%AA/</link><description>Recent content in 性能追踪 on Text Matrix</description><generator>Hugo</generator><language>zh-cn</language><lastBuildDate>Tue, 21 Jul 2026 20:06:14 +0800</lastBuildDate><atom:link href="https://txtmix.com/tags/%E6%80%A7%E8%83%BD%E8%BF%BD%E8%B8%AA/index.xml" rel="self" type="application/rss+xml"/><item><title>magic-trace：Jane Street 开源的高性能实时追踪工具</title><link>https://txtmix.com/posts/tech/magic-trace-janestreet-high-resolution-tracing/</link><pubDate>Sun, 24 May 2026 00:00:00 +0800</pubDate><guid>https://txtmix.com/posts/tech/magic-trace-janestreet-high-resolution-tracing/</guid><description>&lt;h1 id="magic-tracejane-street-开源的高性能实时追踪工具">magic-trace：Jane Street 开源的高性能实时追踪工具&lt;/h1>
&lt;p>magic-trace 是目前少数把 Intel 处理器追踪（Processor Trace, PT）落到应用层调用栈重建上的开源工具。它用硬件级控制流记录换取事后可回放的完整轨迹：约 40 纳秒分辨率、2%-10% 开销、可回看约 10 毫秒（可配置）的调用历史。在采样式 profiler 看不到的微秒级毛刺、竞态时序、崩溃前最后一段执行路径上，magic-trace 提供的是另一种证据。&lt;/p></description></item></channel></rss>