[Cuis-dev] VectorGraphics and ARM64

Phil B pbpublist at gmail.com
Sun Nov 21 14:24:56 PST 2021

VectorGraphics is going to be slow(ish) on any ARM SBC or phone
unless/until it is OpenCL/Vulkan accelerated and maybe even then.  It's a
very computationally intensive subsystem (at least an order of magnitude
more so than raster graphics) and most ARM mobile chips (i.e. pretty much
everything non-Apple) are generally 1/10-1/20th the speed of a fast x86
computer as they are typically inferior in every respect: manufactured on
larger process nodes, lower clock speeds, lower bus bandwidth, weaker
floating point units, smaller and slower cache, slower RAM etc etc.

On Sun, Nov 21, 2021 at 4:46 PM Eric Gade via Cuis-dev <
cuis-dev at lists.cuis.st> wrote:

> Hi all,
> Today I tried building the latest CogVM with the VectorGraphics plugin for
> arm64. If I load up the latest Cuis image and run it, then import the TT
> fonts, the whole system becomes incredibly slow for key tasks. In
> particular, text editing (typing in a Workspace) or moving around windows
> become slow enough to be unusable.
> For reference, I am running this experiment on the MNT Reform, which
> boasts an i.MX8MQ with 4x ARM Cortex-A53 cores (1.5 GHz) -- not exactly the
> fastest.
> Is there some kind of benchmarking I can run to get solid numbers for all
> this? And more importantly, should I not expect to have good performance on
> the given processor?
> On a related note, I did notice that the VectorGraphics enabled UI runs
> much more smoothly on my big desktop (an x86 beast) than it had in the
> past, so that's nice!
> Thanks,
> --
> Eric
> --
> Cuis-dev mailing list
> Cuis-dev at lists.cuis.st
> https://lists.cuis.st/mailman/listinfo/cuis-dev
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