Hi,
Here's some code from pdf.js:
function stringToArray(str) {
var length = str.length;
var array = [];
for (var i = 0; i length; ++i) {
array[i] = str.charCodeAt(i);
}
return array;
}
This kind of code shows up in a number of places in pdf.js. Pretty
simple -- filling in an
On Wed, Jul 16, 2014 at 11:08 PM, Nicholas Nethercote
n.netherc...@gmail.com wrote:
Hi,
Here's some code from pdf.js:
function stringToArray(str) {
var length = str.length;
var array = [];
for (var i = 0; i length; ++i) {
array[i] = str.charCodeAt(i);
}
return array;
}
What happens if you combine 'new Array(length)' + 'array[length - 1] =
default value'? That seems like it would produce the optimal
behavior in all cases.
On Wed, Jul 16, 2014 at 11:40 PM, Nicholas Nethercote
n.netherc...@gmail.com wrote:
On a related note: ObjectElements::VALUES_PER_HEADER is
On Thu, Jul 17, 2014 at 8:34 AM, Nicholas Nethercote
n.netherc...@gmail.com wrote:
Oh wait. It depends on the value of |length|. If it's 2050 or less,
then the right-sized array is allocated immediately. Otherwise, it
allocates 10 elements and then does the doubling thing. I guess
there's a
On 07/16/2014 11:08 PM, Nicholas Nethercote wrote:
So then I tried reverting that change and inserting this line just
before the loop:
array[length - 1] = 0;
And now it avoids the doubling allocations -- the array elements are
allocated once, at the right size. But it feels dirty, and I
On 2014-07-17, 4:35 AM, Jan de Mooij wrote:
On Thu, Jul 17, 2014 at 8:34 AM, Nicholas Nethercote
n.netherc...@gmail.com wrote:
Oh wait. It depends on the value of |length|. If it's 2050 or less,
then the right-sized array is allocated immediately. Otherwise, it
allocates 10 elements and then
On 07/16/2014 11:40 PM, Nicholas Nethercote wrote:
On a related note: ObjectElements::VALUES_PER_HEADER is 2. Is this
because 2 * sizeof(HeapSlot) is 16 bytes, which is equal to
sizeof(ObjectElements)?
Yes.
Nick
On Wed, Jul 16, 2014 at 11:34 PM, Nicholas Nethercote
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