The generated formats are stored inside the texmf cache.
== Experimental speedup ==
In addition to standard [[luatex]] we provide [[luajittex]] which uses just in time compilation to speed up processing. The speedup is mostly due to the faster virtual machine. The exact speedup depends on the tex/lua ratio and we measured speedups between 10% and 40%. You force this engine with
context --jit ....
Alternatively you can put
<texcode>
% engine=luajittex
</texcode>
on top of your main document source.
== Using fonts ==