i have said this before, i think, but having been a 920 owner for a long time, which is a 1gb device, then moving straight onto a 1020 (2gb, alleged 1gb reserved) with the same SOC etc, i noticed that verything i was used to using daily, was snappier, and this was over time, not just when the 1020 was new, so my unscientific feeling was that somehow, somewhere the 1020 was using more than 1gb for normal operations.
well, its not impossible, maybe it lets apps use that extra gig of ram but clears it once the camera is opened?
Have 2gb ram. The memory management has really improved with windows 10. You could have 15 apps open and they will all resume quick(if they are 8.1 apps)
I hope they optimize it a little better for 512MB devices because my Lumia 521 lags severely on WP 10. I'm scared to try it on my daily driver, my Lumia 925.
And you should be because it isn't remotely finished.
The known issues section I believe states that there are some memory issues to be fixed in 512 MB devices.
New Windows 10 Technical Preview build now available for phones