High CPU usage and general unresponsiveness

[joeltimothyoh]

Issue

High CPU usage and general unresponsiveness.

Expectation

Minimal CPU usage and smooth gameplay.

Discussion

One of the recent versions since the closure of #265 appears to have introduced high CPU usage and general unresponsiveness of the application. The delay is bad enough that not even a comfortable typing speed can be achieved.

[leojonathanoh]

Related #251

[leojonathanoh]

In general, #251 relates to rendering the speech only that applies to all modes.

However, addition to #251 impact, performance degradation is also due response validation. In perfection mode, where no amends are allowed, only the current character of the Student response is validated against the Trainer's truth, so there is no impact to performance. In contrast, when perfection is turned off, each and every character in the Student response is validated against the Trainer's truth. @joeltimothyoh

[leojonathanoh]

@joeltimothyoh perhaps, perfection can be turned on by default. I actually think that is better. Amends is generally a less effective way of practising because the Student focuses on corrections.