Module fast_timeout 

The fast and more complicated version of pingora-timeout

The following optimizations are applied:

• The timeouts lazily initialize their timer when the Future is pending for the first time.
• There is no global lock for creating and cancelling timeouts.
• Timeout timers are rounded to the next 10ms tick and timers are shared across all timeouts with the same deadline.

In order for this to work, a standalone thread is created to arm the timers, which has some overhead. As a general rule, the benefits of this don’t outweigh the overhead unless there are more than about 100 timeout() calls/sec in the system. Use regular tokio timeout or super::tokio_timeout in the low usage case.

Structs

FastOrTokioTimeout

The timeout selector generated by fast_timeout().

FastTimeout

The timeout generated by fast_timeout().

Constants

DEFAULT_FAST_TIMEOUT_TO_TOKIO_THRESHOLD

Default duration above which fast_timeout() falls back to Tokio’s timeout.

Functions

fast_sleep

Similar to tokio::time::sleep but more efficient.

fast_timeout

Similar to tokio::time::timeout but more efficient.

fast_timeout_to_tokio_threshold

Return the duration above which fast_timeout() falls back to Tokio’s timeout.

pause_for_fork

Pause the timer for fork()

set_fast_timeout_to_tokio_threshold

Set the duration above which fast_timeout() falls back to Tokio’s timeout.

unpause

Unpause the timer after fork()