Re: System.arraycopy limits and Function.prototype.apply

On Monday, January 2, 2012 12:05:33 PM UTC+1, cko wrote:

So the problem is invoking a varargs function (in our case
Array.splice) with the content of the src array as individual function
arguments.

Why is System.arraycopy() implemented like this?

How would you have done it? Array.splice/Array.slice surely is the fastest emulation of System.arraycopy.

 

Is this a known limitation?

Not to my knowledge; probably no-one ever tried copying that many elements.

 

Are there recommended workarounds?

Something like that maybe?

while (length > MAX_ELEMENTS_PER_COPY) {

  System.arraycopy(src, srcPos, dest, destPost, Math.max(length, MAX_ELEMENTS_PER_COPY));

  srcPos += MAX_ELEMENTS_PER_COPY;

  destPost += MAX_ELEMENTS_PER_COPY;

  length -= MAX_ELEMENTS_PER_COPY;

}

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