Performance
Best Delta Settings for Performance
The settings that matter most for smooth frame pacing and low input lag, especially on older iPhones or demanding NDS titles.
Overview
Most GB and GBA titles run without effort on any iPhone from the last several years, but NDS emulation — especially dual-screen-heavy games — can dip on older hardware, and a few settings changes recover most of that lost headroom.
The biggest levers are frame skip, resolution scaling, and the audio buffer size, each with a real tradeoff between smoothness, sharpness, and latency rather than a single "best" setting that fits every device and game.
Long sessions also run into thermal throttling on iPhones, where sustained heat forces the chip to slow itself down — closing background apps and giving Delta full priority helps push that ceiling back further.
Screenshots
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Step-by-Step
Good to Know
Integer scaling looks noticeably sharper on GBA titles designed around exact pixel grids — well worth the tiny performance cost for how much cleaner it reads.
If an NDS game still stutters after enabling frame skip, try turning off any per-skin blur or shadow effects, which cost more performance than they look like they should.
Fast-forward briefly overloads the CPU on purpose — expect a heat and battery spike while it's active, that's normal and separate from a genuine performance issue elsewhere.
