1 files changed, 64 insertions, 0 deletions
diff --git a/test-app/src/main/java/com/google/android/renderscript_test/TimingTracker.kt b/test-app/src/main/java/com/google/android/renderscript_test/TimingTracker.kt
new file mode 100644
index 0000000..0368368
--- /dev/null
+++ b/test-app/src/main/java/com/google/android/renderscript_test/TimingTracker.kt
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.android.renderscript_test
+
+class TimingTracker(
+    private val numberOfIterations: Int = 1,
+    private var numberOfIterationsToIgnore: Int = 0
+) {
+    init {
+        require(numberOfIterations > numberOfIterationsToIgnore)
+    }
+    private val timings = mutableMapOf<String, IntArray>()
+    private var currentIteration: Int = 0
+    fun nextIteration() {
+        currentIteration++
+    }
+    fun <T> measure(name: String, workToTime: () -> T): T {
+        val start = System.nanoTime()
+        val t = workToTime()
+        if (currentIteration >= numberOfIterationsToIgnore) {
+            val end = System.nanoTime()
+            val deltaInMicroseconds: Int = ((end - start) / 1000).toInt()
+            val timing = timings.getOrPut(name) {
+                IntArray(numberOfIterations - numberOfIterationsToIgnore)
+            }
+            timing[currentIteration - numberOfIterationsToIgnore] += deltaInMicroseconds
+        }
+        return t
+    }
+    fun report(): String {
+        var minimum: Int = Int.MAX_VALUE
+        for (timing in timings.values) {
+            val m = timing.minOrNull()
+            if (m != null && m < minimum) minimum = m
+        }
+
+        println(timings.map { (name, timing) -> name + ": " + timing.minOrNull() }.joinToString(separator = "\n"))
+
+        var minimums =
+            timings.map { (name, timing) -> name + ": " + timing.minOrNull() }.joinToString()
+        var all =
+            timings.map { (name, timing) -> name + ": " + timing.joinToString() }.joinToString()
+        var normalized =
+            timings.map { (name, timing) -> name + ": " + timing.joinToString { "%.2f".format(it.toFloat() / minimum) } }
+                .joinToString()
+
+        return "Minimums: $minimums\n\nAll: $all\n\nNormalized: $normalized\n"
+    }
+}
+