Throttle `_pollImages`

[Nicolas Gallagher]

window.onscroll fires a lot during scrolling. There should really be some functiona call throttling, e.g., http://documentcloud.github.io/underscore/#throttle

[bozdoz]

How's this?

https://github.com/bozdoz/echo/commit/5db605070f3bd59e60ab03845fe80a642810f1b2

[Todd Motto]

Thanks Nicolas, I was just tweeting about this the other day:

https://twitter.com/toddmotto/status/405370085751005184

Throttling makes for much better perf. Also adding a feature that allows the user to add an offset (also in tweet), which will load images 'before' the viewport based on the offset, setting the lazy load off before the user gets there. :)

On 28 Nov 2013, at 18:33, Nicolas Gallagher [e-mail] wrote:

window.onscroll fires a lot during scrolling. There should really be some functiona call throttling, e.g., http://documentcloud.github.io/underscore/#throttle

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[Todd Motto]

Integrated in latest update. Will push shortly.