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SublimeText / PackageDev

Tools to ease the creation of snippets, syntax definitions, etc. for Sublime Text.
MIT License
436 stars 83 forks source link

Noticeable lag scrolling default settings with custom font #191

Closed hovsater closed 6 years ago

hovsater commented 6 years ago

Having PackageDev installed, I get stutter/lag while scrolling through the default settings using either Operator Mono SSm or PragmataPro Mono as my font. Switching to Menlo will make scrolling fluent again. Disabling PackageDev fix the issue, so I'm pretty sure it's what causing the trouble.

Any ideas why this is happening?

FichteFoll commented 6 years ago

I suspect it's the pencil glyph we use as the clickable "edit this" button. It appears that your font might not have he glyph and whatever st or your OS does to resolve the glyph and draw it takes an unreasonable amount of time.

What os are you on?

hovsater commented 6 years ago

@FichteFoll I'm running Mac OS, version 10.13.5 (17F77). Creating an Untitled file of a very large size containing only ✏ still runs smoothly.

FichteFoll commented 6 years ago

If it renders fine in the view itself, it may be an issue with phantoms, since that's where the glyph is rendered in. I'm not at a computer right now, but that's the only thing I can imagine happening.

keith-hall commented 6 years ago

It'd be great if we could identify a way to replicate this with a free font, so that we could investigate locally. In the mean time, @KevinSjoberg, perhaps you could edit https://github.com/SublimeText/PackageDev/blob/da40c753d66c628b9e7d232a5a670f90e0f478a9/plugins_/settings/__init__.py#L250 with https://packagecontrol.io/packages/PackageResourceViewer to change the glyph to a simple letter, and see if that makes any difference in scrolling performance for you with those fonts.

FichteFoll commented 6 years ago

@KevinSjoberg were you able to do what @keith-hall suggested?

hovsater commented 6 years ago

@FichteFoll I'll try this out later today.

hovsater commented 6 years ago

@FichteFoll didn't make a difference, changing the theme did. I'd assume it was the culprit all along.

FichteFoll commented 6 years ago

Thanks for checking. I'll consider this not to be an issue of PD, then.