Chrome Version: 67.x
OS: macOS 10.13

Currently, window dragging in Views skips the "fast path" where AppKit submits a map of draggable regions to the window server, and every click gets hit tested instead:

https://chromium-review.googlesource.com/c/chromium/src/+/1000212/

The Cocoa implementation of frameless app windows used invisible views to define draggable areas for AppKit instead:

https://chromium.googlesource.com/chromium/src/+/0b7daeb3df93c3d877843b8c25cb70aa02b731d6/chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm#224

That could feel snappier, especially when a system is under load. We should consider bringing it to views.