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10:03:32  <Venemo_>hi
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10:16:41  <Venemo_>is it just me or something is not okay with typed arrays in V8? most operations that I tried with them are either slower or only very marginally faster than with normal JS arrays
10:19:29  <mraleph1>Venemo_: depends on what and how you are trying to measure really, it's just that normal JS arrays are already pretty fast.
10:20:28  <mraleph1>[normal JS arrays can even autounbox themselves if you store only doubles]
10:21:20  <Venemo_>allocating a typed array is a LOT slower than allocating a normal array
10:21:40  <mraleph1>yes, this is being worked on. should be somewhat faster in the shell.
10:21:55  <mraleph1>soon, I think, will be faster in the browser as well.
10:22:43  <Venemo_>it's an order of magnitude slower
10:23:09  <Venemo_>which basically defeats the purpose of the typed array, in my opinion
10:23:41  <mraleph1>the reason for this is that typed arrays are implemented on the embedder side (in browser case inside Blink) so allocation has to jump back and forth and use malloc, while JS arrays are just allocated inside V8 heap, which is very fast
10:24:02  <mraleph1>but this is changing, so there should be speedups coming.
10:24:21  <Venemo_>I tested it in node
10:24:30  <mraleph1>the same in node
10:24:36  <mraleph1>they are implemented on the node side
10:25:18  <mraleph1>("they" in this context means: allocation of the memory for the backing storage of the typed array)
10:26:04  <mraleph1>I believe if you take tip of the tree V8, build d8 and then try there allocation should be faster, still not as fast as it could be.
10:26:45  <Venemo_>I understand
10:27:53  <Venemo_>so, sooner or later, it'll get better :)
10:28:10  <mraleph1>I guess you can star https://code.google.com/p/chromium/issues/detail?id=225775
10:28:18  <mraleph1>to know when sooner will come :-)
10:30:59  <Venemo_>can't find the star button
10:31:18  <Venemo_>ah, found it
10:31:22  <Venemo_>it's literally a star
10:31:25  <mraleph1>haha
10:31:36  <mraleph1>yes it is
10:32:17  <mraleph1>anyway, have to go
10:33:21  <Venemo_>okay, thanks for the info :)
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