bruslim

(function() {
    var results = '',
        log = '';
        
    function countSheet(sheet) {
        var count = 0;
        if (!sheet || !sheet.cssRules) return;		
    	for (var j = 0; j < sheet.cssRules.length; j++) {
            if (!sheet.cssRules[j] || !sheet.cssRules[j].selectorText) continue;
            count += sheet.cssRules[j].selectorText.split(',').length;

bruslim

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs