Daniel Eklöf daa8d129c1 pgo: feed VT data through fdm_ptmx(), not vt_from_slave() ... fdm_ptmx(), the FDM callback handler for ptmx data, is just as much in the hot path as vt_from_slave(). It is also slightly more complicated than a read() followed by a call to vt_from_slave(). As a result, some benchmarks performed significantly worse in a partial PGO build than in a full PGO build, since fdm_ptmx() wasn’t PGO:d. To be able to feed data through fdm_ptmx(), we need to set up the delayed rendering timer FDs, configure the timeout values, and provide a readable FD it can read the VT data from. The latter is done with a memory FD. This ensures *all* VT data is loaded into memory before we feed it to the parser.		2020-11-22 19:29:44 +01:00
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pgo.c	pgo: feed VT data through fdm_ptmx(), not vt_from_slave()	2020-11-22 19:29:44 +01:00