I have been troubled by the laggy feedback of the default TeXmacs for quite some time. During typing, I can feel the lag between each key stroke and the corresponding font or formula appearing on screen. Mostly due to one line of code under the if branch postpone_treatment.
I try to understand the meaning of the variable postpone_treatment, which is determined by two static variables keyboard_event and keyboard_special.
When I print out these two variables while typing letter one by one into TeXmacs, I can see that “1" and “0" printed out, which constantly triggers postpone_treatment to be true. And a simple modification of changing 100 -> 1000, I observe worse lag, whereas changing 100 -> 0, I get perfectly fine typing experience.
One side note, I have looked it up in the mailing lists and I can find one relevant topics here, but I don’t find any follow-up.
Best regards,
Joy