x/exp/shiny: multi-second lag on tile example on Mac

[jnjackins]

Reproduce: run exp/shiny/example/tile using gldriver on OS X, drag the image around with mouse.
Expected outcome: The tiles smoothly move around the window.
Actual outcome: The animation is smooth, but there is a delay (up to several seconds) before they begin moving.

This is on OS X 10.10, on a MacBook Pro (Retina, 13-inch, Early 2015).

[rakyll]

/cc @crawshaw

[boomshroom]

I had the same issue with a proof-of-concept game engine I'm working on. On linux and android, it works fine, but on mac input is delayed several seconds (in addition to the keyboard on working)

[crawshaw]

@boomshroom are you using x/mobile/app or shiny on OS X? I believe I have this issue under control in the app package but I have not ported the fix to shiny yet.

[boomshroom]

@crawshaw shiny. mobile/app works fine on both linux and mac. (I have a shiny backend and an mobile/app backend with most code being shared between the 2)

[crawshaw]

Ok great, then when I finish up porting my changes next week this will be fixed.

[jnjackins]

This has been fixed.

[boomshroom]

There still is some input lag (unlike linux where it's practically instant), but it's much better. maybe a half-second of input lag.