Significant latency when selecting Korean on the display (multiple fonts)

[MaximePeresBrt]

Hello everyone, I'm contacting you because I'm having a problem with my GUI that offers a language selection option.

Context:

• My display uses different fonts to allow language selection.

• By default, I have 23 languages ​​stored in a memory (QSPI Flash).

• The Korean language was causing bugs, so I created a second memory dedicated to Korean.

• Currently, I need to make a modification to allow a choice between three languages: English, Chinese, and Korean.

• English and Chinese work without latency, but as soon as I switch to Korean, the display becomes slow.

Memory Data:

• QSPI_FLASH: 94% used (61,901 KB / 65,536 KB)

• Internal FLASH: 78% used (1,616 KB / 2,048 KB)

• RAM: 99% used (635 KB / 640 KB)

Tests Performed:

• Reducing the size of Korean glyphs → slight improvement, but latency is still present.

• Restructuring the font: removing glyphs not used by my translations --> No change.

• Removing blank glyphs (without characters) → no impact.

• Attempting to change addressing in the font --> I don't know if it was done correctly because I don't have full mastery of GUIX Studio.

Hypotheses:

• The latency seems related to RAM saturation (99%).

• Perhaps a sequential lookup in the glyph table.

If anyone is familiar with Guix Studio, I would appreciate your help; I'm a bit stuck.

Thank you in advance.

Sincerely.