"@type": "type.googleapis.com/envoy.extensions.access_loggers.file.v3.FileAccessLog",
          "path": "/dev/null"
        }
      }
    ],
    "profile_path": "/var/lib/istio/data/envoy.prof",
    "address": {
      "socket_address": {
        "address": "127.0.0.1",
        "port_value": 15005
      }
    }
  },
  "dynamic_resources": {
    "lds_config": {
      "ads": {},

          "@type": "type.googleapis.com/envoy.extensions.access_loggers.file.v3.FileAccessLog",
          "path": "/dev/null"
        }
      }
    ],
    "profile_path": "/var/lib/istio/data/envoy.prof",
    "address": {
      "socket_address": {
        "address": "{{ .localhost }}",
        "port_value": {{ .config.ProxyAdminPort }}
      }
    }
  },
  "dynamic_resources": {
    "lds_config": {

			runtime.GC()
			// compilebench parses the memory profile to extract memstats,
			// which are only written in the legacy pprof format.
			// See golang.org/issue/18641 and runtime/pprof/pprof.go:writeHeap.
			const writeLegacyFormat = 1
			if err := pprof.Lookup("heap").WriteTo(f, writeLegacyFormat); err != nil {
				log.Fatalf("%v", err)
			}
			// Close the file after writing the profile.

	// Stop profiler on this thread so that it is safe to lock prof.
	// if a profiling signal came in while we had prof locked,
	// it would deadlock.
	setThreadCPUProfiler(0)

	for !prof.signalLock.CompareAndSwap(0, 1) {
		osyield()
	}
	if prof.hz.Load() != hz {
		setProcessCPUProfiler(hz)
		prof.hz.Store(hz)
	}
	prof.signalLock.Store(0)

	lock(&sched.lock)
	sched.profilehz = hz

	for i := uint32(0); i < _NSIG; i++ {
		if atomic.Load(&handlingSig[i]) != 0 {
			setsig(i, _SIG_DFL)
		}
	}
}

// setProcessCPUProfilerTimer is called when the profiling timer changes.
// It is called with prof.signalLock held. hz is the new timer, and is 0 if
// profiling is being disabled. Enable or disable the signal as
// required for -buildmode=c-archive.
func setProcessCPUProfilerTimer(hz int32) {
	if hz != 0 {

		// Start profiling locally as well.
		prof, err := startProfiler(profiler)
		if err != nil {
			hostErrs = append(hostErrs, NotificationPeerErr{
				Host: *thisAddr,
				Err:  err,
			})
		} else {
			globalProfiler[profiler] = prof
			hostErrs = append(hostErrs, NotificationPeerErr{
				Host: *thisAddr,
			})
		}
	}

			if p == k {
				v.Stop()
				delete(globalProfiler, k)
			}
		}
	}

	for _, profiler := range profiles {
		prof, err := startProfiler(profiler)
		if err != nil {
			s.writeErrorResponse(w, err)
			return
		}
		globalProfiler[profiler] = prof
	}
}

// DownloadProfilingDataHandler - returns profiled data.

// functions, so we use an exported function. Exported functions are created in
// lexicographical order of source files, so this file is named aprof.go to
// ensure its function is first.

// extern void CallGoNop();
import "C"

import (
	"bytes"
	"fmt"
	"runtime/pprof"
	"time"
)

func init() {
	register("CgoCCodeSIGPROF", CgoCCodeSIGPROF)
}

//export GoNop
func GoNop() {}

and flags that apply to the resulting test binary.

Several of the flags control profiling and write an execution profile
suitable for "go tool pprof"; run "go tool pprof -h" for more
information. The --alloc_space, --alloc_objects, and --show_bytes
options of pprof control how the information is presented.

The following flags are recognized by the 'go test' command and
control the execution of any test:

	-bench regexp

//
// # Usage examples
//
// Use the pprof tool to look at the heap profile:
//
//	go tool pprof http://localhost:6060/debug/pprof/heap
//
// Or to look at a 30-second CPU profile:
//
//	go tool pprof http://localhost:6060/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:6060/debug/pprof/block
//