[#9999] node: Add off-cpu profiler

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

go.mod

@@ -19,6 +19,7 @@ require (
 	github.com/cheggaaa/pb v1.0.29
 	github.com/chzyer/readline v1.5.1
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc
+	github.com/felixge/fgprof v0.9.5
 	github.com/flynn-archive/go-shlex v0.0.0-20150515145356-3f9db97f8568
 	github.com/gdamore/tcell/v2 v2.7.4
 	github.com/go-pkgz/expirable-cache/v3 v3.0.0
@@ -77,6 +78,7 @@ require (
 	github.com/go-logr/logr v1.4.2 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/golang/snappy v0.0.4 // indirect
+	github.com/google/pprof v0.0.0-20240227163752-401108e1b7e7 // indirect
 	github.com/gorilla/websocket v1.5.1 // indirect
 	github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus v1.0.0 // indirect
 	github.com/grpc-ecosystem/go-grpc-middleware/v2 v2.0.1 // indirect

pkg/util/http/pprof.go

@@ -3,8 +3,14 @@ package httputil
 import (
 	"net/http"
 	"net/http/pprof"
+
+	"github.com/felixge/fgprof"
 )
 
+func init() {
+	http.DefaultServeMux.Handle("/debug/fgprof", fgprof.Handler())
+}
+
 // initializes pprof package in order to
 // register Prometheus handlers on http.DefaultServeMux.
 var _ = pprof.Handler("")