How do you speed up vst?

You can increase the efficiency of VST by using the following methods.

1 - Use fewer Unison Voices - Each unison voice creates a replica of the original signal, which means double the work. Try to use a low unison voice value. 6-9 is good.

2 - Use modulation wisely - Modulation is automated automation; the more the number of modulated parameters, the more will be CPU used.

3 - Choose the plugin wisely - You can make a basic pluck simply by using a saw wav and a Low pass filter with an ADSR envelope, for this purpose using a High Spec VST I not necessary.

4 - Avoid Plugins with heavy RAM usage; like Kontakt libraries with high sample rate and storage.

5 - Get presets for plugin with low specs - like ANNMS Music, you can find presets for plugin like GMS, Toxic Biohazard, Harmor etc. These lugins are very efficient and the presets are free.