24 lines
1.7 KiB
Diff
24 lines
1.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Andy Locascio <andy@slack-corp.com>
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Date: Wed, 21 Aug 2019 12:09:10 -0700
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Subject: fix: disabling compositor recycling
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Compositor recycling is useful for Chrome because there can be many tabs and spinning up a compositor for each one would be costly. In practice, Chrome uses the parent compositor code path of browser_compositor_view_mac.mm; the NSView of each tab is detached when it's hidden and attached when it's shown. For Electron, there is no parent compositor, so we're forced into the "own compositor" code path, which seems to be non-optimal and pretty ruthless in terms of the release of resources. Electron has no real concept of multiple tabs per window, so it should be okay to disable this ruthless recycling altogether in Electron.
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diff --git a/content/browser/renderer_host/render_widget_host_view_mac.mm b/content/browser/renderer_host/render_widget_host_view_mac.mm
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index 30e1f5005e09cb1e23a7e86f35e6736bb5fa60f1..a832270eedd4a92d9cfb2beb07b2978c90250b94 100644
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--- a/content/browser/renderer_host/render_widget_host_view_mac.mm
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+++ b/content/browser/renderer_host/render_widget_host_view_mac.mm
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@@ -478,7 +478,11 @@
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return;
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host()->WasHidden();
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- browser_compositor_->SetRenderWidgetHostIsHidden(true);
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+ // Consider the RWHV occluded only if it is not attached to a window
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+ // (e.g. unattached BrowserView). Otherwise we treat it as visible to
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+ // prevent unnecessary compositor recycling.
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+ const bool unattached = ![GetInProcessNSView() window];
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+ browser_compositor_->SetRenderWidgetHostIsHidden(unattached);
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}
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void RenderWidgetHostViewMac::SetSize(const gfx::Size& size) {
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