2 Calculating collapsed borders for big tables is expensive, so we cache them and recalculate when needed.
3 Here we change table border width, expect that cache is invalidated and paint produces expected image.
8 <link rel=
"stylesheet" href=
"../../../fast/table/border-collapsing/resources/cached.css">
11 <table style=
"border-collapse:collapse; border:4px solid blue" id=
"tbl">
13 <td style=
"border:2px solid lime"/>