EBEAST: index.html: disable Vuejs `performance` config to fix leaks
EBEAST: index.html: disable Vuejs `performance` config to fix leaks

Firefox (76), Chrome (83) and Electron (7) all show major memory
leakage during animation rendering when the Vuejs `performance`
config is enabled which uses the performance.measure() web API.
The leaks strangely occour *outside* of the JS heap which shows
steady usage of a few dozen megabytes while the browser process
footprint goes through the roof (gigabytes).

Signed-off-by: Tim Janik <6ec6ff229c4e1c5bbd5933ee92e6c5832ff023bb@gnu.org>

tim-janik/beast,tim-janik/beast,tim-janik/beast,swesterfeld/beast,swesterfeld/beast,swesterfeld/beast,tim-janik/beast,swesterfeld/beast,swesterfeld/beast,swesterfeld/beast,tim-janik/beast,swesterfeld/beast,tim-janik/beast,tim-janik/beast