Hands-On High Performance with Go

Exploring pprof-like traces

The Go tool trace can also generate four different types of traces that may be pertinent to your troubleshooting needs:

• net: A network-blocking profile
• sync: A synchronization-blocking profile
• syscall: A syscall-blocking profile
• sched: A scheduler-latency profile

Let's take a look at an example of how to use these tracing profiles on a web server:

1. First, we initialize our main and import the necessary packages. Note the blank identifier for the explicit package name within _ "net/http/pprof". This is used in order to make sure we can make the tracing call:

package mainimport (    "io"    "net/http"    _ "net/http/pprof"    "time") 

2. We next set up a simple web server that waits five seconds and returns a string to the ...