Low bandwidth v2.0.0-beta.13, v2.0.0-beta.14 about byte-stream HOT 10 CLOSED

What about beta 13?

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If it is actually caused by beta 13, these are the changes. It seems that readable streams are now allowed to defer to other operations mid-stream. This shouldn't be an issue unless there are other things happening in your process besides reading and those things consume 100% of the CPU load or are synchronous.

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There are a lot of requests to PostgreSQL, HTTP requests, and PHPMailer calls via amphp/parallel are also used. The code does not use blocking threads. The thread limit in RabbitMQ is set to 20 per worker. CPU load is not more than 80%.

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I think this may be due to optimization to avoid latency between a few reads in a row introduced in beta 13. Can you please try v2.x-dev (current 2.x branch) to see if b5a09a3 fixes the issue?

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@PNixx I can't reproduce any such behavior with the examples, so it'd be really helpful to hear your feedback for the commit mentioned above. Did you also update any other libraries?

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Checked on v2.0.0 - all works correctly

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@PNixx Thanks for confirming!

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After the update, I periodically catch errors in various microservices:

Uncaught Exception: Fiber stack protect failed: mprotect failed: Cannot allocate memory (12) in /home/shared/vendor/revolt/event-loop/src/EventLoop/Internal/AbstractDriver.php:479
Stack trace:
#0 /home/shared/vendor/revolt/event-loop/src/EventLoop/Internal/AbstractDriver.php(479): Fiber->start()
#1 /home/shared/vendor/revolt/event-loop/src/EventLoop/Internal/AbstractDriver.php(533): Revolt\EventLoop\Internal\AbstractDriver->invokeCallbacks()

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I think the problems started after adding repeat reading v2.0.0-beta.12...v2.0.0-beta.13

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@kelunik Very unstable code behavior. I had to downgrade the following packages:
amphp/byte-stream: v2.0.0-beta.12
amphp/socket: v2.0.0-beta.7
amphp/dns: v2.0.0-beta.5
amphp/http-client: v5.0.0-beta.6
On the specified versions, the most stable and fastest processing.

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