nested and on-the-fly functions removed, bind introduced instead

[veljkopopovic]

Using bind instead of 'on-the-fly' functions, self variable will not be trapped in a closure, allowing garbage collector to release resources once function is done.

On the other hand, 'on-the-fly' functions introduces a bit of performance penalty since engine is forced to compile function over and over again.
This way, functions are statically created, no context variable dependency, arguments remain only function input parameter ...

[jhiesey]

How much does this improve memory usage in practice? I'd like to see some numbers before merging, especially since I don't personally like this stylistically as much.

[veljkopopovic]

Merge it or not, it's up to you. If you do some comparison, feel free to
let me know, we have recorded leaks on SmartOs and this was a partial
solution for that but we did not save any records about it. We do not have
time to reproduce it right now.

Main reasons I have done it this way was to, first of all, remove so called
calback hell and get a bit clearer picture of given function usage. On the
other hand, but not less important, using self variable all around nested
functions will not give a chance to a garbage collector to recognize moment
when 'self' is not necessary any more, missing a chance to collect it and
destroy it. This scenario will lead to memory leaks eventually. Some
engines promises better support for garbage collecting inline functions,
but promises are one thing and reality is another.

Best regards

On Sun, Jul 10, 2016 at 8:54 AM John Hiesey [email protected]
wrote:

How much does this improve memory usage in practice? I'd like to see some
numbers before merging, especially since I don't personally like this
stylistically as much.

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[jhiesey]

Sounds like it might help. I'll give it a test in a few modern browsers sometime in the near future and let you know how it goes. Thanks!

[jscheid]

I think this would also help with a Google Closure Compiler error I'm running into:

stdin:245570: ERROR - functions can only be declared at top level or immediately within another function in ES5 strict mode
		function read () {
		^^^^^^^^^^^^^^^^^^

(The filename/line number are cryptic, but I've traced them back to https://github.com/jhiesey/stream-http/blob/v2.7.2/lib/response.js#L46)

So, I'd like to put in a vote for getting this merged (after conflicts are fixed) :-)

[jhiesey]

OK, I'll take another look into this week and see about fixing the conflicts.