[perf_hooks] Add new perf_hooks module

app/nodejs-v10/src/test/scala/io/scalajs/nodejs/perf_hooks/PerfHooksTest.scala

@@ -0,0 +1,11 @@
+package io.scalajs.nodejs.perf_hooks
+
+import org.scalatest.funspec.AnyFunSpec
+
+class PerfHooksTest extends AnyFunSpec {
+  describe("PerfHook") {
+    it("constants") {
+      assert(PerfHooks.constants.NODE_PERFORMANCE_GC_MAJOR === 2)
+    }
+  }
+}

app/nodejs-v10/src/test/scala/io/scalajs/nodejs/perf_hooks/PerformanceObserverTest.scala

@@ -0,0 +1,24 @@
+package io.scalajs.nodejs.perf_hooks
+
+import org.scalatest.funspec.AnyFunSpec
+import scala.scalajs.js
+
+class PerformanceObserverTest extends AnyFunSpec {
+  describe("PerformanceObserver") {
+    it("callback should be when new entry added to the performance timeline") {
+      var called = false
+      val instance = new PerformanceObserver((_, observer) => {
+        called = true
+        observer.disconnect()
+      })
+      instance.observe(
+        ObserveOptions(
+          entryTypes = js.Array("mark")
+        )
+      )
+      Performance.mark("test")
+
+      assert(called)
+    }
+  }
+}

app/nodejs-v12/src/test/scala/io/scalajs/nodejs/perf_hooks/PerfHooksTest.scala

@@ -0,0 +1,11 @@
+package io.scalajs.nodejs.perf_hooks
+
+import org.scalatest.funspec.AnyFunSpec
+
+class PerfHooksTest extends AnyFunSpec {
+  describe("PerfHook") {
+    it("monitorEventLoopDelay") {
+      assert(PerfHooks.monitorEventLoopDelay().exceeds === 0)
+    }
+  }
+}

app/nodejs-v14/src/main/scala/io/scalajs/nodejs/perf_hooks/PerfHooks.scala

@@ -0,0 +1,21 @@
+package io.scalajs.nodejs
+package perf_hooks
+
+import com.thoughtworks.enableIf
+
+import scala.scalajs.js
+import scala.scalajs.js.annotation.JSImport
+
+@js.native
+trait PerfHooks extends js.Object {
+  def constants: Constants = js.native
+
+  @enableIf(io.scalajs.nodejs.internal.CompilerSwitches.gteNodeJs12) def monitorEventLoopDelay(): Histogram = js.native
+  @enableIf(io.scalajs.nodejs.internal.CompilerSwitches.gteNodeJs12) def monitorEventLoopDelay(
+      options: MonitorEventLoopDelayOptions
+  ): Histogram = js.native
+}
+
+@js.native
+@JSImport("perf_hooks", JSImport.Namespace)
+object PerfHooks extends PerfHooks

app/nodejs-v14/src/main/scala/io/scalajs/nodejs/perf_hooks/Performance.scala

@@ -0,0 +1,85 @@
+package io.scalajs.nodejs
+package perf_hooks
+
+import _root_.net.exoego.scalajs.types.util.Factory
+import com.thoughtworks.enableIf
+
+import scala.scalajs.js
+import scala.scalajs.js.annotation.JSImport
+
+@js.native
+@JSImport("perf_hooks", "Performance")
+class Performance extends js.Object {
+  def clearMarks(): Unit             = js.native
+  def clearMarks(name: String): Unit = js.native
+
+  def mark(): Unit             = js.native
+  def mark(name: String): Unit = js.native
+
+  def measure(name: String, statMark: String, endMark: String): Unit = js.native
+  @enableIf(io.scalajs.nodejs.internal.CompilerSwitches.gteNodeJs14)
+  def measure(name: String, statMark: String): Unit = js.native
+  @enableIf(io.scalajs.nodejs.internal.CompilerSwitches.gteNodeJs14)
+  def measure(name: String): Unit = js.native
+
+  def nodeTiming: PerformanceNodeTiming = js.native
+
+  def now(): Double = js.native
+
+  def timeOrigin: Double = js.native
+
+  def timerify[T <: js.Function](fn: T): T = js.native
+}
+
+@js.native
+@JSImport("perf_hooks", "performance")
+object Performance extends Performance
+
+@Factory
+trait PerformanceEntry extends js.Object {
+  def duration: Double
+  def name: String
+  def startTime: Double
+  def entryType: String
+  def kind: js.UndefOr[Int]
+
+  @enableIf(io.scalajs.nodejs.internal.CompilerSwitches.gteNodeJs14)
+  def flags: js.UndefOr[Int]
+}
+
+@Factory
+trait PerformanceNodeTiming extends PerformanceEntry {
+  def bootstrapComplete: Double
+  def environment: Double
+  def loopExit: Double
+  def loopStart: Double
+  def nodeStart: Double
+  def v8Start: Double
+}
+
+@js.native
+@JSImport("perf_hooks", "constants")
+object Constants extends Constants
+
+@js.native
+trait Constants extends js.Object {
+  val NODE_PERFORMANCE_GC_MAJOR: Int       = js.native
+  val NODE_PERFORMANCE_GC_MINOR: Int       = js.native
+  val NODE_PERFORMANCE_GC_INCREMENTAL: Int = js.native
+  val NODE_PERFORMANCE_GC_WEAKCB: Int      = js.native
+
+  @enableIf(io.scalajs.nodejs.internal.CompilerSwitches.gteNodeJs14) val NODE_PERFORMANCE_GC_FLAGS_NO: Int = js.native
+  @enableIf(io.scalajs.nodejs.internal.CompilerSwitches.gteNodeJs14) val NODE_PERFORMANCE_GC_FLAGS_CONSTRUCT_RETAINED
+      : Int = js.native
+  @enableIf(io.scalajs.nodejs.internal.CompilerSwitches.gteNodeJs14) val NODE_PERFORMANCE_GC_FLAGS_FORCED: Int =
+    js.native
+  @enableIf(
+    io.scalajs.nodejs.internal.CompilerSwitches.gteNodeJs14
+  ) val NODE_PERFORMANCE_GC_FLAGS_SYNCHRONOUS_PHANTOM_PROCESSING: Int = js.native
+  @enableIf(io.scalajs.nodejs.internal.CompilerSwitches.gteNodeJs14) val NODE_PERFORMANCE_GC_FLAGS_ALL_AVAILABLE_GARBAGE
+      : Int = js.native
+  @enableIf(io.scalajs.nodejs.internal.CompilerSwitches.gteNodeJs14) val NODE_PERFORMANCE_GC_FLAGS_ALL_EXTERNAL_MEMORY
+      : Int = js.native
+  @enableIf(io.scalajs.nodejs.internal.CompilerSwitches.gteNodeJs14) val NODE_PERFORMANCE_GC_FLAGS_SCHEDULE_IDLE: Int =
+    js.native
+}

app/nodejs-v14/src/main/scala/io/scalajs/nodejs/perf_hooks/PerformanceObserver.scala

@@ -0,0 +1,59 @@
+package io.scalajs.nodejs
+package perf_hooks
+
+import com.thoughtworks.enableMembersIf
+import _root_.net.exoego.scalajs.types.util.Factory
+
+import scala.scalajs.js
+import scala.scalajs.js.annotation.JSImport
+
+@js.native
+@JSImport("perf_hooks", "PerformanceObserver")
+class PerformanceObserver(callback: js.Function2[PerformanceObserverEntryList, PerformanceObserver, Any])
+    extends js.Object {
+  def disconnect(): Unit = js.native
+
+  def observe(options: ObserveOptions): Unit = js.native
+}
+
+@Factory
+trait ObserveOptions extends js.Object {
+  var entryTypes: js.Array[String]
+  var buffered: js.UndefOr[Boolean] = js.undefined
+}
+
+@js.native
+trait PerformanceObserverEntryList extends js.Object {
+  def getEntries(): js.Array[PerformanceEntry] = js.native
+
+  def getEntriesByName(name: String): js.Array[PerformanceEntry]                 = js.native
+  def getEntriesByName(name: String, `type`: String): js.Array[PerformanceEntry] = js.native
+
+  def getEntriesByType(`type`: String): js.Array[PerformanceEntry] = js.native
+
+  def monitorEventLoopDelay(): Histogram                                      = js.native
+  def monitorEventLoopDelay(options: MonitorEventLoopDelayOptions): Histogram = js.native
+}
+
+@enableMembersIf(io.scalajs.nodejs.internal.CompilerSwitches.gteNodeJs12)
+@js.native
+trait Histogram extends js.Object {
+  def disble(): Boolean                 = js.native
+  def enable(): Boolean                 = js.native
+  def exceeds: Double                   = js.native
+  def max: Double                       = js.native
+  def mean: Double                      = js.native
+  def min: Double                       = js.native
+  def percentile(value: Double): Double = js.native
+  def stddev: Double                    = js.native
+
+  // TODO: Return js.Map
+  def percentiles: js.Object = js.native
+
+  def reset(): Unit = js.native
+}
+
+@Factory
+trait MonitorEventLoopDelayOptions extends js.Object {
+  var resolution: js.UndefOr[Double] = js.undefined
+}