Slow chunk loading speed: https://youtu.be/xPGp7ZtxL6c
I believe on 0.12 and 0.13 chunk loading speed was capped by CPU thus it loaded few times faster.
PC Specs: i5 6600K @4.0GHz, 16Gb RAM, GTX 970. Game is running on Crucial MX200 250GB SSD, video is captured on MX100 512Gb SSD using ShadowPlay (the reason why it was captured in tablet mode) hardware encoding.

Options used in video beginning is attached. There's modified view distance of 512 blocks, but in the end if reset this to game maximum of 352 to show that it's not the reason.

P.S. Look closely to CPU Utilization, temps are low, so it's not CPU throttling. Other games work fine.
P.P.S. It wouldn't be a problem, if chunks was loading once, but loading happens every time i do alt-tab, so it's pretty annoying.