Report process CPU time in extended diagnostics

tsc/internal/execute/build/orchestrator.go

@@ -60,7 +60,7 @@ func (b *OrchestratorResult) reportWithFilesToDelete(o *Orchestrator, reportFile
 		return
 	}
 	b.Statistics.SetTotalTime(o.opts.Sys.SinceStart())
-	b.Statistics.Report(o.opts.Sys.Writer(), o.opts.Testing)
+	b.Statistics.Report(o.opts.Sys.Writer(), o.opts.Testing, o.opts.Command.CompilerOptions.ExtendedDiagnostics.IsTrue())
 }
 
 type Orchestrator struct {

tsc/internal/execute/tsc/emit.go

@@ -60,7 +60,7 @@ func EmitAndReportStatistics(input EmitInput) (CompileAndEmitResult, *Statistics
 		runtime.ReadMemStats(&memStats)
 
 		statistics = statisticsFromProgram(input, &memStats)
-		statistics.Report(input.Writer, input.Testing)
+		statistics.Report(input.Writer, input.Testing, input.Config.CompilerOptions().ExtendedDiagnostics.IsTrue())
 	}
 
 	if result.EmitResult.EmitSkipped && len(result.Diagnostics) > 0 {

tsc/internal/execute/tsc/statistics.go

@@ -10,6 +10,7 @@ import (
 	"time"
 
 	"github.com/microsoft/TypeScript/tsc/internal/compiler"
+	"github.com/microsoft/TypeScript/tsc/internal/osutil"
 )
 
 type tableRow struct {
@@ -83,7 +84,7 @@ func statisticsFromProgram(input EmitInput, memStats *runtime.MemStats) *Statist
 	}
 }
 
-func (s *Statistics) Report(w io.Writer, testing CommandLineTesting) {
+func (s *Statistics) Report(w io.Writer, testing CommandLineTesting, extendedDiagnostics bool) {
 	if testing != nil {
 		testing.OnStatisticsStart(w)
 		defer testing.OnStatisticsEnd(w)
@@ -126,6 +127,11 @@ func (s *Statistics) Report(w io.Writer, testing CommandLineTesting) {
 	}
 	s.addContentMapperStatistics(&table, prefix)
 	table.add(prefix+"Total time", s.compileTimes.totalTime)
+	if extendedDiagnostics {
+		if cpuTime, err := osutil.ProcessCPUTime(); err == nil {
+			table.add("CPU time", cpuTime)
+		}
+	}
 	table.print(w)
 }
 

tsc/internal/osutil/cputime_other.go

@@ -0,0 +1,12 @@
+//go:build !unix && !windows
+
+package osutil
+
+import (
+	"errors"
+	"time"
+)
+
+func processCPUTime() (time.Duration, error) {
+	return 0, errors.ErrUnsupported
+}

tsc/internal/osutil/cputime_unix.go

@@ -0,0 +1,17 @@
+//go:build unix
+
+package osutil
+
+import (
+	"time"
+
+	"golang.org/x/sys/unix"
+)
+
+func processCPUTime() (time.Duration, error) {
+	var usage unix.Rusage
+	if err := unix.Getrusage(unix.RUSAGE_SELF, &usage); err != nil {
+		return 0, err
+	}
+	return time.Duration(usage.Utime.Nano()) + time.Duration(usage.Stime.Nano()), nil
+}

tsc/internal/osutil/cputime_windows.go

@@ -0,0 +1,17 @@
+package osutil
+
+import (
+	"time"
+
+	"golang.org/x/sys/windows"
+)
+
+func processCPUTime() (time.Duration, error) {
+	var creation, exit, kernel, user windows.Filetime
+	if err := windows.GetProcessTimes(windows.CurrentProcess(), &creation, &exit, &kernel, &user); err != nil {
+		return 0, err
+	}
+	kernelTicks := uint64(kernel.HighDateTime)<<32 | uint64(kernel.LowDateTime)
+	userTicks := uint64(user.HighDateTime)<<32 | uint64(user.LowDateTime)
+	return time.Duration(kernelTicks+userTicks) * 100 * time.Nanosecond, nil
+}

tsc/internal/osutil/osutil.go

@@ -1,5 +1,7 @@
 package osutil
 
+import "time"
+
 // Args returns the command-line arguments with platform-specific launcher details removed.
 func Args() []string {
 	return args()
@@ -9,3 +11,9 @@ func Args() []string {
 func Executable() (string, error) {
 	return executable()
 }
+
+// ProcessCPUTime returns cumulative user and system CPU time across all threads
+// of the current process, excluding child processes.
+func ProcessCPUTime() (time.Duration, error) {
+	return processCPUTime()
+}