Significant runtime blowup when formatting pattern guards - Githubissues

ennocramer / floskell

Floskell is a flexible Haskell source code pretty printer.

BSD 3-Clause "New" or "Revised" License

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Significant runtime blowup when formatting pattern guards #67

Closed Philonous closed 11 months ago

Philonous commented 2 years ago

Floskell takes 6s on my machine to reformat the following code fragment:

foo x | Just x1 <- Just x
      , Just x2 <- Just x1
      , Just x3 <- Just x2
      , Just x4 <- Just x3
      , Just x5 <- Just x4
      , Just x6 <- Just x5
      , Just x7 <- Just x6
      = True

On my production code it takes up to 4 minutes for 20 lines.
Removing one of the pattern guards makes it complete instantly
Removing floskell.json and using the implicit or an empty configuration makes it complete instantly
The smallest floskell.json I can reproduce this with is { "style": "cramer" }; I have not tried to find the individual option from the style that causes this
I'm running floskell 0.10.5

ennocramer commented 11 months ago

This problem has been addressed with floskell-0.11.0.