Async source reprocessing

[Tianxiang Xiong]

A question on the Emacs StackExchange stumped me: how to created an async Helm source that doesn't re-run the process with each change in the pattern? In other words, how to make use of a Helm source that only retrieves its candidates asynchronously once?

[Thierry Volpiatto]

The only way actually is to suspend update (C-!) at startup, it is
useful for example to enter a long regexp and not be annoyed by the
constant update each time you enter character. I use it also a lot when
debugging.

--
Thierry