Awesome

pprof

gin pprof middleware

Package pprof serves via its HTTP server runtime profiling data in the format expected by the pprof visualization tool.

Usage

Start using it

Download and install it:

go get github.com/gin-contrib/pprof

Import it in your code:

import "github.com/gin-contrib/pprof"

Example

package main

import (
  "github.com/gin-contrib/pprof"
  "github.com/gin-gonic/gin"
)

func main() {
  router := gin.Default()
  pprof.Register(router)
  router.Run(":8080")
}

change default path prefix

func main() {
  router := gin.Default()
  // default is "debug/pprof"
  pprof.Register(router, "dev/pprof")
  router.Run(":8080")
}

custom router group

package main

import (
  "net/http"

  "github.com/gin-contrib/pprof"
  "github.com/gin-gonic/gin"
)

func main() {
  router := gin.Default()
  debugGroup := router.Group("/debug", func(c *gin.Context) {
    if c.Request.Header.Get("Authorization") != "foobar" {
      c.AbortWithStatus(http.StatusForbidden)
      return
    }
    c.Next()
  })
  pprof.RouteRegister(debugGroup, "pprof")
  router.Run(":8080")
}

Use the pprof tool

Then use the pprof tool to look at the heap profile:

go tool pprof http://localhost:8080/debug/pprof/heap

Or to look at a 30-second CPU profile:

go tool pprof http://localhost:8080/debug/pprof/profile?seconds=30

Or to look at the goroutine blocking profile, after calling runtime.SetBlockProfileRate in your program:

go tool pprof http://localhost:8080/debug/pprof/block

Or to collect a 5-second execution trace:

wget http://localhost:8080/debug/pprof/trace?seconds=5

Download the pprof profile data:

curl -v -H "Authorization: foobar" -o profile.pb.gz \
  http://localhost:8080/debug/pprof/profile?seconds=60
go tool pprof -http=:8099 profile.pb.gz