large-table-background-change.html | Explore in Territory

<!DOCTYPE html>
<body>
<script src="../resources/runner.js"></script>
<script src="resources/paint.js"></script>
<style>
  table {
    border-collapse: collapse;
    will-change: transform;
  }
  table.zero-width-border td {
    border: 0px solid blue;
  }
  table.visible-border td {
    border: 1px solid blue;
  }
</style>
<script>
function createTable(rows, columns) {
    var table = document.createElement("TABLE");
    for (var i = 0; i < rows; ++i) {
        var tr = document.createElement("TR");
        for (var j = 0; j < columns; ++j) {
            var td = document.createElement("TD");
            tr.appendChild(td);
        }
        table.appendChild(tr);
    }
    return table;
}

var table1 = createTable(300, 300);
table1.className = 'zero-width-border';
document.body.appendChild(table1);

var table2 = createTable(300, 300);
table2.className = 'invisible-border';
document.body.appendChild(table2);

var table3 = createTable(300, 300);
table3.className = 'visible-border';
document.body.appendChild(table3);

var count = 0;
var ix = 30;
var iy = 30;

measurePaint({
  iterationCount: 30,
  run: function() {
    var table = [table1, table2, table3][count % 3];
    table.childNodes[iy].childNodes[ix].style.backgroundColor = 'teal';
    ix++;
    iy++;
    count++;
  },
});
</script>
</body>
chromium/third_party/blink/perf_tests/paint/large-table-background-change.html
