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@zshell31
zshell31 / what-forces-layout.md
Created November 30, 2015 07:38 — forked from paulirish/what-forces-layout.md
What forces layout/reflow. The comprehensive list.

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Element

Box metrics
  • elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
  • elem.clientLeft, elem.clientTop, elem.clientWidth, elem.clientHeight
  • elem.getClientRects(), elem.getBoundingClientRect()
@zshell31
zshell31 / copy.c
Created January 22, 2016 12:54 — forked from ThiefMaster/copy.c
copy
/* Copy a regular file from SRC_NAME to DST_NAME.
If the source file contains holes, copies holes and blocks of zeros
in the source file as holes in the destination file.
(Holes are read as zeroes by the `read' system call.)
When creating the destination, use DST_MODE & ~OMITTED_PERMISSIONS
as the third argument in the call to open, adding
OMITTED_PERMISSIONS after copying as needed.
X provides many option settings.
Return true if successful.
*NEW_DST is as in copy_internal.