It’s an irritation really as Sublime’s UI is normally so smooth and nice. When first running Sublime, the window briefly ‘flashes’ before being drawn. Didn’t do this at build 3143 and not sure which dev build this might have crept in. Opening settings window also flashes. Opening new windows or projects within them doesn’t flash. Upgraded from 3143 and using Soda Dark 3 theme with Base16 Tomorrow Night colour scheme.
Just an annoyance but anyone else notice this?
Here you go Will. Thanks 
DPI mode: system
DPI scale: 1
startup, version: 3170 windows x64 channel: stable
executable: /C/Users/qgates/sublime/sublime_text.exe
working dir: /C/Users/qgates/sublime
packages path: /C/Users/qgates/sublime/Data/Packages
state path: /C/Users/qgates/sublime/Data/Local
zip path: /C/Users/qgates/sublime/Packages
zip path: /C/Users/qgates/sublime/Data/Installed Packages
ignored_packages: ["ColorSchemeEditor-master", "LiveStyle", "Vintage", "WordCount"]
Errors parsing theme:
icon_file_type is missing layer0.opacity, setting to 1.0 for backwards compatibility
icon_folder is missing layer0.opacity, setting to 1.0 for backwards compatibility
icon_folder_loading is missing layer0.opacity, setting to 1.0 for backwards compatibility
pre session restore time: 0.140779
startup time: 0.185779
first paint time: 0.186779
reloading plugin Default.arithmetic
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plugins loaded
syncScroll starting
Emmet: No need to update PyV8
Package Control: Skipping automatic upgrade, last run at 2018-05-10 18:12:54, next run at 2018-05-10 19:12:54 or after
The first paint time is pretty quick, so that seems good.
Are you running WIndows 7?
Yes, Windows 7 x64. At 3143, the window just fades in nicely as it should, but at 3170, the window it flashes very briefly in a light colour before drawing). Since my theme/colour scheme is dark, it’s quite noticeable although very brief.
Just tried a portable install. It’s less noticeable on startup than on my live copy, but very noticeable when opening Preferences…Settings (or Prefs…Keybindings), particularly if the parent window is quite large and wide. And for the purposes of this test, I’m using the adaptive theme with Monokai, so the whole window is quite dark.
I haven’t noticed it recently, but in the past, when my pc was running slow it was sometimes very noticeable - when opening a new window it is just white for a few seconds. It doesn’t bother me though
As stated in my issue the flash of white is caused by some synchronous (plugin-)operation which delayes the client area of a window from being rendered. Windows draws the main window but ST’s UI is delayed by some millisecs. What you see as ‘flash of white’ is a raw Window without any content.
You won’t notice it with no or only few packages being active. The more packages are installed, which hook up the EventApi the more likely this effect is especially during startup, when tons of plugins need to be initialized and both sublime_text and plugin_host are very busy.
I modified the Default/settings.py to do a couple of things asynchronously, which avoids the flash of white but renders me a blank view for about 5-10s after startup until the 2-col-layout for preferences is set up and files are loaded.
Looks like the run_command API or the layout changes contain some kind of bottleneck.
I concur with that summary. My feeling is that there is some brief delay between the Sublime window itself being drawn (with a lighter background) and the painting of the theme / editing area colourscheme. That delay seems to be exaggerated by a ‘real world’ Sublime setup with a bunch of plugins etc…
Although I notice it (to a lesser extent) even with a vanilla portable install. In that case it’s subtle on startup but quite clear when opening Prefs…Settings, or Prefs…Keybindings. It’s most noticeable with a dark theme/colour scheme + wide window.
It’s no big deal but Sublime prides itself on a smooth, slick UI and up to build 3143 that’s been the case. It just ‘feels’ slightly more clunky now.
I’ve just noticed more aggressive flashing when using F11 to maximise Sublime. The space to be occupied flashes white before the Sublime theme and editing area are drawn.
Confirmed.
EDIT: The funny thing even is, the Desktop background picture to sometimes show up shortly, even though other windows’s are open in the background.