Minor performance improvements

[abdulhannanali]

Small pull requests which makes minor performance improvements to the libraries

• Eliminates an additional tick by checking the length before hand and if it needs to be started (fyi each unnecessary tick hurts a kitten 🐱 )
• Use filter instead of splice
  Removing the use of splice and for loop in destroy method with filter since it's more efficient and IMO more clearer though.

Additional discussions:

• Replacing the for loop in tick function too
  I did not make a PR with that, since that's a big function and there's only one scenario (when animation ends) we need to make any mutations to the array, so doing a filter will make the code clunky, but this is something I would like to discuss further.

have a nice day. thanks for this library

[pakastin]

Actually I think custom for loop filter would be even faster.. Good changes, I'll check out these in the evening – thank you!!

[pakastin]

I haven't been updating this for a while, there's a whole lot more changes I'd make today so I check those out first.. 😉

[abdulhannanali]

@pakastin Yup custom for loop filter would be faster, and we can do a remove function, which can be used at both places but the problem with that is, more code, while filter is simple and fast enough for our usage, there's a considerable difference between splice and the filter method, custom for loop filter overkill maybe, as it's going to be used at only one place. Check out the jsPerf benchmarks I linked to 😄

[abdulhannanali]

@pakastin Yup custom for loop filter would be faster, and we can do a remove function, which can be used at both places but the problem with that is, more code, while filter is simple and fast enough for our usage, there's a considerable difference between splice and the filter method, custom for loop filter overkill maybe, as it's going to be used at only one place. Check out the jsPerf benchmarks I linked to 😄