Jens Johansen
4216dc8d12
Ultimatley this proved not very useful (for me at this time at least). As it might be useful in the future, though, I'll land it here. Change-Id: I7e6c7ad878d290763d2b2c0f3c372bf7f6521ea1 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/184422 Commit-Queue: Jens Johansen <jensj@google.com> Reviewed-by: Johnni Winther <johnniwinther@google.com>
101 lines
2.5 KiB
Dart
101 lines
2.5 KiB
Dart
// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// @dart=2.9
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import '../tool/_fasta/entry_points.dart' show compileEntryPoint;
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main(List<String> arguments) async {
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await compileEntryPoint(arguments);
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if (numCalls.isNotEmpty) {
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print("[");
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bool printed = false;
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for (int i = 0; i < numCalls.length; i++) {
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int value = numCalls[i];
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if (value != null && value > 0) {
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if (printed) print(",");
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print("$i, $value");
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printed = true;
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}
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}
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print("]");
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} else if (inCall.isNotEmpty) {
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print("[");
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bool printed = false;
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for (int i = 0; i < inCall.length; i++) {
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int value = inCall[i];
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if (value == null) continue;
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if (value != 0) throw "$i has value $value";
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if (printed) print(",");
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int time = callTimes[i];
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print("$i, $time");
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printed = true;
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}
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print("]");
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}
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}
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List<int> numCalls = [];
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void registerCall(int procedureNum) {
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while (numCalls.length <= procedureNum) {
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if (numCalls.length < 8) {
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numCalls.length = 8;
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} else {
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numCalls.length *= 2;
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}
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}
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numCalls[procedureNum] ??= 0;
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numCalls[procedureNum]++;
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}
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List<int> inCall = [];
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List<int> callTimes = [];
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Stopwatch stopwatch = new Stopwatch()..start();
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void registerCallStart(int procedureNum) {
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while (inCall.length <= procedureNum) {
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if (inCall.length < 8) {
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inCall.length = 8;
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callTimes.length = 8;
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} else {
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inCall.length *= 2;
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callTimes.length *= 2;
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}
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}
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inCall[procedureNum] ??= 0;
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callTimes[procedureNum] ??= 0;
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if (inCall[procedureNum]++ == 0) {
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// First --- start a timer-ish.
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callTimes[procedureNum] -= stopwatch.elapsedMicroseconds;
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}
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}
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void registerCallEnd(int procedureNum) {
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if (inCall[procedureNum]-- == 1) {
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// Last --- stop the timer-ish.
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callTimes[procedureNum] += stopwatch.elapsedMicroseconds;
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}
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}
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@pragma("vm:prefer-inline")
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void preferInlineMe() {
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// This makes it easier to get the annotation :).
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}
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int busyWait(int micro) {
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int count = 0;
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Stopwatch stopwatch = new Stopwatch()..start();
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while (true) {
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for (int i = 0; i < 1000; i++) {
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count++;
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}
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int elapsed = stopwatch.elapsedMicroseconds;
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if (elapsed >= micro) {
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print("Bye from busywait after $count iterations ($elapsed vs $micro)!");
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return count;
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}
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}
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}
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