instrumentVdomSnippet.js

// COUNTERS FOR INSTRUMENTATION

var refEqSkippedNodes, refEqSkippedDescendants;

function _VirtualDom_diff(x, y)
{
	var patches = [];
	refEqSkippedNodes = 0;
	refEqSkippedDescendants = 0;
	_VirtualDom_diffHelp(x, y, patches, 0);
	console.log("skipped diff for " + refEqSkippedNodes + " nodes (REF EQ)");
	console.log("skipped diff for " + refEqSkippedDescendants + " descendants (REF EQ)");
	return patches;
}

function _VirtualDom_diffHelp(x, y, patches, index)
{
	if (x === y)
	{
		refEqSkippedNodes++;
		refEqSkippedDescendants += (x.__descendantsCount || 0);
		return;
	}
	...
}