Makes sense. There's not just a maximum heap size, there are also various per-object size limits.
Internal backing stores for dictionaries have a maximum size, effectively limiting arrays with dictionary mode elements to ~22.3 million elements. We may (or may not) be able to increase that limit, but it will never disappear entirely. When you avoid forcing the array into dictionary mode by not passing such a huge size to its constructor, you'll notice that you can grow it to about 77 million elements. As an added benefit, you'll get a significant speedup. (For the record, the advice not to pass sizes to Array constructors only applies to big arrays. For up to several thousand elements, it is (or can be) beneficial to specify the size, because then V8 will actually pre-allocate the required space. At some cutoff point, though, the heuristics will decide that pre-allocation this much space is a bad idea, so you'll get a dictionary mode array without any pre-allocated backing store instead.) On Fri, Apr 12, 2013 at 3:16 PM, Francesco Furiani <[email protected]>wrote: > > > Create an Array with lenght 2^28 (that is < 2^32) > Do a for/while loop to put inside this array some int values (eg the value > of the counter itself) > Node crashes around the 20mil element when reaching (according to system > monitor 1.7/1.8 Gb of RAM) > > v8 (3.14.5.8, the one in node 0.10.4), 64bit enviroment, > 16Gb ram, > --max_old_space_size=16192 on command line > > Snippet: > > var newFilledArray2 = function(len) { > var a = new Array(len); > for(var i = 0; i < len; i++) { > a[i] = i; > } > return a;}; > var jsArray = newFilledArray(Math.pow(2,28)); > > -- > -- > v8-users mailing list > [email protected] > http://groups.google.com/group/v8-users > --- > You received this message because you are subscribed to the Google Groups > "v8-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- -- v8-users mailing list [email protected] http://groups.google.com/group/v8-users --- You received this message because you are subscribed to the Google Groups "v8-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
