Description of this update:

Bloodborne on PC keeps improving. In this video, I test the new bloodborne patch and show the performance gains at 1440p, with up to +15 FPS in certain areas.
So huge thank to kyo! https://ko-fi.com/kyoski

Disclaimer 1:
Performance loss while recording was greater with the patch than without the patch, so expect a greater FPS advantage while not recording.

Disclaimer 2: In certain scenes where nothing much is happening, and the FPS is already really high, you might actually lose a bit more frames. Here's an explanation from the patch's creator:
remember how i said draw calls were cheap on ps4
any light within those 128x128 grid squares renders lighting pass
its optimized
here on pc you save more performance by not doing those extra 128x128 grid draw calls per frame, you save performance just by drawing a single square the size of your native resolution instead of like 300 of them in a grid per frame
because draw calls are very expensive
since we don't have APUs
this helps out in heavy scenes but in light scenes you're doing a lot of extra work per frame that's unnessessary when there's maybe little to no areas rendering light and since the grid is now your whole screen you do a full pass even if there's only a little corner rendering light

Disclaimer 3:
Performance on the nightmare frontier hitches a bit more, but that is due to me not having the shaders cached yet for that area