Discuss if and where we should use the state variables

[yuktea]

What

• Using state for when we have larger things to work with some bigger/costlier things (maybe large regex), which we could scope to a function without spending reinitialization costs. We could discuss where and if we should use it in this thread here.
• A little Context: https://perlmaven.com/static-and-state-variables-in-perl

Part of

• Refactor Product Opener #5527

[alexgarel]

For regexp initialization, it seems that using qr operator with constants or Fast::Const can be a way to go.

$ my constant $p = qr/t.st+ *moi/i
$Regexp1 = (?^i:t.st+ *moi);

$ $p
$Regexp1 = (?^i:t.st+ *moi);

$ "test moi" =~ $p
1

[stephanegigandet]

FYI, state arrays and hashes can't be initialized in Perl versions earlier than 5.28 (we use 5.24 in prod)

#7058

[github-actions]

This issue is stale because it has been open 90 days with no activity.