Flash player 16.0.0.296 - slow and laggy

Question

When there was a 11 version, everything was fine, nothing slows, hardware acceleration works fine.
But it was necessary to install 12,13 and above, 90% of video on the flash players began to slow down.
And this has been going on for a long time, on different hardware, video cards ..
In html5 all perfectly played, with almost no lag..
Tested on various configurations, different browsers(latest versions) - Opera, firefox, chrome, slow even on powerful hardware..
At home I have 4770k and GTX 650, reinstall the system / driver, still lag, as with hardware acceleration and without.
At work I have a 3970k and GTX 680, flash player still laggy almost on most common browsers, on html5 almost everything is fine.
This is not harware problem, because everything else works fine, just laggy Flash Player adds a white veil on video, with hardware acceleration on.

Answer 1

Disabling hardware is going to hurt performance, as you've shifted all of the work of decoding and rendering from the GPU to the CPU.  For Firefox, because of how the sandboxing model works, the impact is probably a multiple of what you see on Opera, where there's no NPAPI sandboxing.  Opera Next uses the PPAPI Flash Player, which is both sandboxed and done in a way that's much more efficient.
I'm not quite sure what I'm looking at in the screenshots.  Blur and alpha effects (which is what I think I'm seeing in that right screenshot) might require hardware depending on how they're implemented (Stage3D pixel shaders) and may not be rendered in software mode (you've disabled hardware, so we're in SW mode).  If you're using the PPAPI plug-in in Opera, the hardware acceleration setting wouldn't have propagated from the NPAPI version, which might explain why it's still enabled there (or Opera just ignores the NPAPI setting for whatever reason - we don't really spend a lot of time with Opera because of the small market-share).
So you really want hardware enabled for performance reasons, but the issues you're seeing with hardware acceleration are not expected.  I know that some people running intel i7 chips have been complaining about stuttering video playback, but setting processor affinity usually provides a decent workaround, and I have bugs filed to look at the underlying issue.  There's no ETA at this time, as we don't have a diagnosis there and it's unclear if the processor issue is correlation or causation.  It's a popular modern chip, so it might just be showing up a lot...