I created a little test in the sandbox page...

This result is encouraging !

It means that the rate of ping-pong between the HTTaP server and the browser can reach 72 per second.

Of course I cheated :

• There was no real workload, I just requested /?ping and didn't even bother checking the reply.
• The test is on the same computer, on a multi-processor system, so there is no network latency at all.

But it's always good to check the higher bound, right ? It confirms that it's possible to create useful interactive systems despite the serialised link.

Note however some of the untold features :

• The test can run without interference from other clients, even in another tab.
• The test can run along with other operations (such as the PING button) thanks to the queueing semaphore.

Not bad...

As usual : check the latest version in the files section.

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The rate drops to 25/s on a DSL line with a ping time of 20ms so this is coherent...