Any performance benefit to “locking down” JavaScript objects?
There’s been no difference in performance since at least Chrome 47.0.2526.80 (64-bit). Testing in Chrome 6.0.3359 on Mac OS 10.13.4 ———————————————– Test Ops/sec non-frozen object 106,825,468 ±1.08% fastest frozen object 106,176,323 ±1.04% fastest Performance test (available at http://jsperf.com/performance-frozen-object): const o1 = {a: 1}; const o2 = {a: 1}; Object.freeze(o2); // Non-frozen object: for(var key in … Read more