Web view straight into framebuffer

[R3Devil]

Hi guys,
I have an application written in node.js and Electron.js.
Running in Chromium, from desktop (Raspbian Jessie), the performance is laggy.

I've been told that running the web view straight to framebuffer (without X) will give me a performance boost.

Unfortunately, I have no experience with this.
Someone here with experience on this that can point me in the right direction?

[topguy]

Its a possibility that QtWebEngine from Qt5.9+ compiled for RPi with EGLFS support ( OpenGL ES2 ) can be the solution for you.
QtWebengine has a Chromium core and using EGLFS lets you use the GPU for (some of) the rendering.

There are many recepies and scripts out there to build Qt5 for raspbian both for local builds and for cross-compiling, I believe that building QtWebengine is only practical with cross-compiling because of the limited RAM of the Pi.

But before you head down the Qt5 rabbithole you should try to enable the experimental OpenGL driver for X-windows. It might give you the rendering boost you are looking for.

[R3Devil]

Thank you so much for your reply
I have already experimentet with the OpenGL (combined with different ram splits).
This improved the video playing in background, but unfortunately it did not improve the responsivness or the scrolling lag.

I'm searcing the web for solutions. Will definitly check out Qt5 if no other solutions pops up.
Thank you!

[droleary]

I have an application written in node.js and Electron.js.
Running in Chromium, from desktop (Raspbian Jessie), the performance is laggy.

Well, you've chosen just about the most inefficient stack to use, so that's not surprising. What's your free look like? Direct rendering seems like a premature optimization if the resource you're actually starved for is RAM. A native app could kill both birds with one stone, though.

[R3Devil]

Well, you've chosen just about the most inefficient stack to use, so that's not surprising. What's your free look like? Direct rendering seems like a premature optimization if the resource you're actually starved for is RAM. A native app could kill both birds with one stone, though.

By free look, do you mean without scrolling - like e.x. the landing page? Well, that looks ok. And it looks ok when mouse hovering over items (which gives an effect).

The reason why we choosed Electron / JS is because of the cross platform ability. We are developing on a PC and my mate is a front end developer.

[tpylkko]

no, like free as in the program/package that outputs RAM usage information.

[topguy]

Run "top" or "cat /proc/meminfo"

The answer you are looking for is "MemTotal" minus "Active" (called "used" in top).