Example A - Improving Rendering Performance with CSS Containment

FIRST RUN (contain: none)
=========================

 1) Change "targetInner" content... Time (ms): 10.400000005960464
 2) Change "targetInner" content... Time (ms): 0
 3) Change "targetInner" content... Time (ms): 0
 4) Change "targetInner" content... Time (ms): 0
 5) Change "targetInner" content... Time (ms): 0.09999999403953552
 6) Change "targetInner" content... Time (ms): 0
 7) Change "targetInner" content... Time (ms): 0.09999999403953552
 8) Change "targetInner" content... Time (ms): 0
 9) Change "targetInner" content... Time (ms): 0
10) Change "targetInner" content... Time (ms): 0

	==> AVERAGE (ms): 1.0599999994039535


SECOND RUN (contain: strict)
============================

 1) Change "targetInner" content... Time (ms): 0
 2) Change "targetInner" content... Time (ms): 0
 3) Change "targetInner" content... Time (ms): 0
 4) Change "targetInner" content... Time (ms): 0
 5) Change "targetInner" content... Time (ms): 0
 6) Change "targetInner" content... Time (ms): 0
 7) Change "targetInner" content... Time (ms): 0
 8) Change "targetInner" content... Time (ms): 0
 9) Change "targetInner" content... Time (ms): 0
10) Change "targetInner" content... Time (ms): 0

	==> AVERAGE (ms): 0

PERFORMANCE IMPROVEMENT: 100% (Infinityx)