Description:
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Several users of phpredis (a PHP interface to Redis) have noticed (in php from 7.4.0 and onwards) that TLS connections to Redis time out.  When we establish non-TLS connections to Redis (using the same phpredis), we experience no timeout.

I have personally verified the issue exists on all versions of 7.4 from 7.4.0 to 7.4.5, and that the issue does not exists on version 7.3.17



Test script:
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The test script is longer than 20 lines, so here is a link:
https://github.com/phpredis/phpredis/issues/1726

Here you can find the script, its output, log trace, and explanation of test setup.

Expected result:
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The expectation is that TLS connections are either established or not in a consistent amount of time, but not seemingly randomly timing out (taking a large amount of time to fail).

Actual result:
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The actual result is that TLS connections are being established in an inconsistent amount of time.