the max length of an array in javascript

Question

I've met a problem in learning javascript.Here is my code:

var arr = [];
for (let i = 0; i <4294967296; i=i+1){
    arr[i] = 1;}

But both in chrome and firefox,it ended up with something wrong.I know that the max length of an array is 4294967295(2^32-1) in javascript,when i changed 4294967296 to 4294967295, 4294967294 , or a little more smaller,it still didn't work.I also tested it in Node.js,after a while of executing,it just ended with:

FATAL ERROR: invalid array length Allocation failed - JavaScript heap out of memory

I don't know why?

Also http://stackoverflow.com/questions/6154989/maximum-size-of-an-array-in-javascript — rnevius, May 26 '16 at 13:04
The theoretical maximum is not, necessarily, the same as the practical maximum which is based on available memory and the JavaScript engine itself. — David Thomas, May 26 '16 at 13:04
You're truing to make an array with over 4 billion 8-byte numbers. At the very minimum, that will consume 32 gigabytes of memory. — Pointy, May 26 '16 at 13:05

score 0 · Answer 1 · answered May 26 '16 at 13:12

0

1 is an integer and is 4 bytes or 8 bytes long in memory (depending on your OS), so you must not have 4M * this length bytes available in memory.

answered May 26 '16 at 13:12

kintaro horowitz

1

What you really mean is 4G?I think that is the reason. – buggo May 26 '16 at 15:45

the max length of an array in javascript

1 Answers1