Android Question System image in Android emulator

[b4auser1]

I found in the Android 5.0 API 21 four system images for x86:
default x86
default x86_64
google_apis x86
google_apis x86_64

Which image to use if I develop under Win 8.1 x64 ?
I don't use Google API, but want to save disk space (small SSD) and leave the fastest image with most of functionality.

Which image: google_apis x or default x is faster under the Win 8.1 x64?
Which image: x86 or x86_64 is faster on the Win 8.1 x64?

If there is no difference in speed, I will leave google_apis x86_64, as it has more functionality than others.

 

[Erel]

Have you tried the default x86_64 image?

 

[b4auser1]

I tested both default x86_64 and google_apis x86_64
Both work.
Tested debug (legacy) - it works as well.
It looks, that speed is the same. I will leave google_apis x86_64. If I have troubles, then try to install and use default.