common/httpserver: enable block and mutex profiling

The value for block should match CPU profiling at 99Hz. The value for
mutex looks low enough to not add too much overhead. There is no
overhead while not profiling.

common/httpserver/root.go

@@ -10,6 +10,7 @@ import (
 	"net"
 	"net/http"
 	"net/http/pprof"
+	"runtime"
 	"time"
 
 	"github.com/chenyahui/gin-cache/persist"
@@ -65,6 +66,8 @@ func New(r *reporter.Reporter, configuration Configuration, dependencies Depende
 		c.mux.HandleFunc("/debug/pprof/profile", pprof.Profile)
 		c.mux.HandleFunc("/debug/pprof/symbol", pprof.Symbol)
 		c.mux.HandleFunc("/debug/pprof/trace", pprof.Trace)
+		runtime.SetBlockProfileRate(int(10 * time.Millisecond.Nanoseconds())) // 1/10ms
+		runtime.SetMutexProfileFraction(1000)                                 // 0.1%
 	}
 	return &c, nil
 }