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Resizing the window is very slow #37

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sedwards2009 opened this issue Oct 23, 2016 · 3 comments
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Resizing the window is very slow #37

sedwards2009 opened this issue Oct 23, 2016 · 3 comments
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bug fixed prio:high

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@sedwards2009
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When Extraterm contains many frames (~100) it can take seconds for the window to update after a resize. The same applies when splitting/unsplitting the window panes.

Most of the problem is caused by the uncoordinated update of the DOM by the hundreds of CodeMirror instances. This thrashes the browser DOM and causes a lot of unneeded layouts and work.
@sedwards2009
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This is also likely affect other desired features like tab font sizing.

@sedwards2009 sedwards2009 mentioned this issue Oct 23, 2016
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@sedwards2009
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I think this also affects entering/exiting cursor mode.

sedwards2009 added a commit that referenced this issue Oct 27, 2016
@sedwards2009
When doing operations on many CodeMirror instances, group them into o…
2b6a589 
…ne CodeMirror operation to reduce DOM thrashing. Result: huge speed ups when resizing.

 #37
@sedwards2009
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A bunch of use cases have been improved, but full refreshes (i.e. after changing the font size or CSS) tend to explode in time as the scrollback grows. #40 is the final solution for this.

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