Surly Jon, for...loop is on of the fastest looping mechanism. In the example we are using forEach() for the exceptional behavior. Under the hood forEach() using something like the below code.
while(k<len){// HERE len IS THE ACTUAL ARRAY LENGTH AND k START FROM 0if(CHECKIFarray[k]ISEMPTYSLOT)continue;// DO THE OTHER STAFF}
Using forEach() can skip some unnecessary heavy calculation. What if we accidentally set array[400] = "SOME VALUE" and the other slots are empty, then we have to unnecessarily execute our heavy calculation function 400 times that will affect the performance.
yes, that is the point of my post how we can write good quality code, where can we do the mitake? if we do mistake in our code it can be affect the performance and create unnecessary bug.
Precisely - and by addressing the symptom rather than the cause i.e. by switching from a 'for loop' to forEach - you would actually be making the performance of the optimal (bug fixed) system worse than before.
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Surly Jon,
for...loopis on of the fastest looping mechanism. In the example we are usingforEach()for the exceptional behavior. Under the hoodforEach()using something like the below code.Using
forEach()can skip some unnecessary heavy calculation. What if we accidentally setarray[400] = "SOME VALUE"and the other slots are empty, then we have to unnecessarily execute our heavy calculation function400times that will affect the performance.If you're accidentally setting
array[400]then that is your problem, and it needs fixing. The heavy calculation is merely a side effect of your bugyes, that is the point of my post how we can write good quality code, where can we do the mitake? if we do mistake in our code it can be affect the performance and create unnecessary bug.
It's still a micro optimization. The for loop can loop through 400 empty places in an array in what, 5ms? It's extremely fast.
Precisely - and by addressing the symptom rather than the cause i.e. by switching from a 'for loop' to
forEach- you would actually be making the performance of the optimal (bug fixed) system worse than before.