how to improve the latency of invoking async callbacks?

[yalin zhang]

I am doing Electron development. I got a performance problems.

In my project, I used libuv to do async request and callbacks.

The event loop is uv_default_loop(). Two kinds of handles are created, one for common callbacks and the other is for http request.

What I observe is that the http request is invoked after a large latency - (around 100ms) while the common callbacks are invoked almost immediately.(1ms).

Could anyone tell me what is the possible cause？ How can I check where is the bottleneck?

Is there any solution to shorten the latency?

Thanks!

Here is the log:

[open-electron:dev] mobilecv2: 1.0.7.0616

[open-electron:dev] Send Http Request at 1614838881:800

[open-electron:dev] Do http request - ListSize: 1 at 1614838881.816 [first http request is invoked shortly]

[open-electron:dev] Send Http Request at 1614838882:206 [2nd http request]

[open-electron:dev] Send Http Request at 1614838882:206

[open-electron:dev] Send Http Request at 1614838882:252

[open-electron:dev] Send Http Request at 1614838882:258

[open-electron:dev] Queue and Fire Async Callback at 1614838882:296

[open-electron:dev] Do http request - ListSize: 4 at 1614838882.310 [start to invoke 2nd http request, which is 104ms later]

[open-electron:dev] Do callback event - ListSize: 1 at 1614838882.318

[open-electron:dev] Queue and Fire Async Callback at 1614838882:328

[open-electron:dev] Do callback event - ListSize: 1 at 1614838882.329 [common callbacks are invoked less than 1ms later]