Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2395143 by amateescu, Fabianx, Berdir, beejeebus, dashaforbes, alexpott, larowlan, znerol, dawehner, catch, neclimdul, yched, fgm, effulgentsia: YAML parsing is very slow, cache it with FileCache

Revert "Issue #2395143 by amateescu, Fabianx, Berdir, beejeebus, dashaforbes, larowlan, dawehner, catch, alexpott, neclimdul, yched, znerol, fgm, effulgentsia: YAML parsing is very slow, cache it with FileCache"

This reverts commit 4192117d.

Issue #2395143 by amateescu, Fabianx, Berdir, beejeebus, dashaforbes, larowlan, dawehner, catch, alexpott, neclimdul, yched, znerol, fgm, effulgentsia: YAML parsing is very slow, cache it with FileCache