System Puzzles

These puzzles may be used to perform various system functions such as printing to console, measuring performance, getting/setting rendered pixel ratio and retrieving the GPU information.

"print to console"

Prints data of any type to the browser console. The latter can usually be opened with the F12 key (Chrome, Firefox on Windows, Linux). On Mac use the View > Developer > JavaScript Console menu (Option-Cmd-J) in Chrome, or the Develop > Show Error Console menu (Option-Cmd-C) in Safari.

"print performance info"

Records a performance profile during 1 second and prints it to the browser console. The latter can usually be opened with the F12 key (Chrome, Firefox on Windows, Linux). On Mac use the View > Developer > JavaScript Console menu (Option-Cmd-J) in Chrome, or the Develop > Show Error Console menu (Option-Cmd-C) in Safari.

"feature available"

Check if a feature selected from the drop-down is available in the user's browser.

"get GPU"

Outputs the user's GPU info - vendor, for example: NVIDIA Corporation, Apple Inc., Qualcomm, and GPU model, for example: GeForce GTX 1060 3GB/PCIe/SSE2, Apple A9 GPU, Adreno (TM) 330.

"set screen scale"

Set screen resolution factor for the rendered canvas. Set this value higher than 1 to improve quality, 1 - default screen scale on non-retina displays.

"native screen scale"

Native canvas resolution factor. Equal to 1 for non-retina displays.