Jerky refresh with high update rate

[phstrauss]

Hello go-gl devs,

On https://gist.github.com/phstrauss/fef583df44f0bf1c9d9d3764cdbeafcb you'll find a simple example which trigger a performance bug at least on my computer. The GL window is all jerky to a really painfull point while the same in C gives no issue.

Am'I doing something wrong? The rate at which data is updated is approx 100 times a second.
Thanks for your input.

This is using golang 1.25.5 on an amd64 debian 13 linux.
My go.sum:

github.com/go-gl/gl v0.0.0-20231021071112-07e5d0ea2e71 h1:5BVwOaUSBTlVZowGO6VZGw2H/zl9nrd3eCZfYV+NfQA=
github.com/go-gl/gl v0.0.0-20231021071112-07e5d0ea2e71/go.mod h1:9YTyiznxEY1fVinfM7RvRcjRHbw2xLBJ3AAGIT0I4Nw=
github.com/go-gl/glfw/v3.3/glfw v0.0.0-20250301202403-da16c1255728 h1:RkGhqHxEVAvPM0/R+8g7XRwQnHatO0KAuVcwHo8q9W8=
github.com/go-gl/glfw/v3.3/glfw v0.0.0-20250301202403-da16c1255728/go.mod h1:SyRD8YfuKk+ZXlDqYiqe1qMSqjNgtHzBTG810KUagMc=
github.com/go-gl/gltext v0.0.0-20170328174336-01a355945a70 h1:jLHSn7wgzCXTsZoldNrhgFS5fasJxb8Htn+iaYsZt88=
github.com/go-gl/gltext v0.0.0-20170328174336-01a355945a70/go.mod h1:KpCmHMLAPxpCBuDN9Tp7mjJA7lwFZNc2bZ0rCi/X6yc=
github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g=
github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
github.com/mattkane218/gosndfile v0.0.0-20171006180803-e0c9ef895ee2 h1:xlrQyeGf3JChKSThoDQ6jsFFUaLiLLmrUMP4FhHphdw=
github.com/mattkane218/gosndfile v0.0.0-20171006180803-e0c9ef895ee2/go.mod h1:geQYqMAJUtp5SLjj4Koh4TxLeexCWjEAjMIch4Yjg98=
github.com/mjibson/go-dsp v0.0.0-20180508042940-11479a337f12 h1:dd7vnTDfjtwCETZDrRe+GPYNLA1jBtbZeyfyE8eZCyk=
github.com/mjibson/go-dsp v0.0.0-20180508042940-11479a337f12/go.mod h1:i/KKcxEWEO8Yyl11DYafRPKOPVYTrhxiTRigjtEEXZU=
github.com/xthexder/go-jack v0.0.0-20220805234212-bc8604043aba h1:QighQ8fJJOqipXXurg9WghoImtvl7CHTpe21GDYdIkk=
github.com/xthexder/go-jack v0.0.0-20220805234212-bc8604043aba/go.mod h1:T6DswVPJzBW/Xg64l/gohXVgSW81GwXyMws1fkqxlUg=
golang.org/x/image v0.35.0 h1:LKjiHdgMtO8z7Fh18nGY6KDcoEtVfsgLDPeLyguqb7I=
golang.org/x/image v0.35.0/go.mod h1:MwPLTVgvxSASsxdLzKrl8BRFuyqMyGhLwmC+TO1Sybk=

Oh I forgot, cpu usage of the go process is negligible but gnome-shell eats 50%-55% of a CPU thread (laptop CPU of 2022, amd ryzen 5700).

Kind regards.
Philippe.