| <!DOCTYPE html> |
| <html> |
| <body> |
| <script src="../../resources/runner.js"></script> |
| <script> |
| "use strict"; |
| |
| const totalMessages = 10000; |
| |
| const channel = new MessageChannel(); |
| const sender = channel.port1; |
| const receiver = channel.port2; |
| |
| let pendingDeliveries = 0; |
| let iterationStart = 0; |
| |
| function onMessage() |
| { |
| if (--pendingDeliveries !== 0) |
| return; |
| |
| const elapsed = PerfTestRunner.now() - iterationStart; |
| if (!PerfTestRunner.measureValueAsync(elapsed)) |
| return; |
| |
| setTimeout(runIteration, 0); |
| } |
| |
| receiver.onmessage = onMessage; |
| |
| function runIteration() |
| { |
| pendingDeliveries = totalMessages; |
| iterationStart = PerfTestRunner.now(); |
| for (let i = 0; i < totalMessages; ++i) |
| sender.postMessage(0); |
| } |
| |
| PerfTestRunner.prepareToMeasureValuesAsync({ |
| description: 'Time to deliver a batch of ' + totalMessages + ' messages, ' |
| + 'in a never-shipped, same-context MessagePort pair.', |
| unit: 'ms', |
| }); |
| |
| setTimeout(runIteration, 0); |
| </script> |
| </body> |
| </html> |
