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//return an array of objects according to key, value, or key and value matching | |
function getObjects(obj, key, val) { | |
var objects = []; | |
for (var i in obj) { | |
if (!obj.hasOwnProperty(i)) continue; | |
if (typeof obj[i] == 'object') { | |
objects = objects.concat(getObjects(obj[i], key, val)); | |
} else | |
//if key matches and value matches or if key matches and value is not passed (eliminating the case where key matches but passed value does not) | |
if (i == key && obj[i] == val || i == key && val == '') { // |
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Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
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