On Mon, Aug 3, 2015 at 8:34 AM, Allen Wirfs-Brock <al...@wirfs-brock.com> wrote:
[snip]
>
> 4) JSON.parse/stringify are pure computational operations. There is no
> perf benefit to making them asynchronous unless some of their computation
> can be performed concurrently.
>
If we're speaking strictly about making the JSON parsing asynchronous,
then correct, there is really no performance benefit to speak of. You
may be able to offload the parsing to a separate thread, but it's
going to take the same amount of time. The real benefit will come when
(a) JSON parsing becomes incremental and (b) a developer is given
greater control over exactly how the JSON is converted to/from
strings.
Something along the lines of...
JSON.parser(input).
on('key', function(key, context) {
if (key === 'foo')
console.log(context.value());
else if (key === 'bar')
context.on('key', ...);
}).
on('end', function() {
});
In other words: allowing for incremental access to the stream and fine
grained control over the parsing process, rather than having to block
while everything is parsed out, building up the in-memory object
model, then being forced to walk that model in order to do anything
interesting.
Personally, I'm not overly concerned about the possibility of races.
- James
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