flamegraph

【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 简介 初学golang（一个月多），之前主要用其他语言，如有问题欢迎指出。 安装 go get github.com/uber/go-torch # 再安装 brendangregg/FlameGraph export PATH=$PATH:/absolute/path/FlameGraph-master # 还需要安装一个graphviz用来画内存图 yum install graphviz 代码修改 import "net/http" import _ "net/http/pprof" func main() { // 主函数中添加 go func() { http.HandleFunc("/program/html", htmlHandler) // 用来查看自定义的内容 log.Println(http.ListenAndServe("0.0.0.0:8080", nil)) }() } 使用 # 用 -u 分析CPU使用情况 ./go-torch -u http://127.0.0.1:8080 # 用 -alloc_space 来分析内存的临时分配情况 ./go-torch -alloc_space http://127.0.0.1:8080/debug/pprof/heap --colors

I'm trying to better understand how to interpret chrome flame charts. In the below chart _changeHandler is shown as four distinct blocks. However I know for fact that it's only being called once. I saw a similar question here, which claims this might be a bug, but that was four years ago: What are this gap mean in Chrome devtools profile flame chart Question: In which case would chrome perf tools show gaps in the flame chart for the same function call ? The real problem is that it really invalidates the entire graph. The bottom of the graph fragments but the top parts are the same function. I