Reaction to pressing Shift is delayed, even with "Optimize for games"

I'm running Windows 7 and tried to play some precision platforming games, e.g. http://www.delicious-fruit.com/ratings/game_details.php?id=12373
These games require precise inputs and reaction time on key press >10-20ms can make a difference. The default "jump" key for many of these games is Shift. Even with "Optimize for games" enabled, there is still delay 50-100ms. Without "Optimize for games" it's even worse, aka 300-400ms. When I re-bind the "jump" key in the example game to "z", it works with no delay. However, not all of similar games allow key re-binding, forcing to use Shift for jumps. Can you make reaction time on Shift key as fast as on other key like "z", please? While playing those games, I can even be ok with non-smooth work of combinations Shift+key.

 

Bumping the thread. It's really important for me, as games is the main reason I use Parallels.

 

Hi,
Could you try to paste following bootflag in VM configuration Hardware > Boot Order > Advanced > Boot flags:
devices.kbd.end_delay=10
also you may try this one:
devices.kbd.end_delay=0

 

Thanks a lot!
This solved the issue. I can't clearly tell the difference with using Shift or not Shift with value 10. I'll use 0 though just to guarantee no delay.

 

you are welcome

 

Hello Friends
These diversions require exact inputs and response time on key press 10-20ms can have any kind of effect. The default "hop" key for a number of these amusements is Shift.

 

Optimize for your game Best Guidlines Provided for this post Nice Post.

 

Hi, try the steps provided above. Let us know if the issue persist.