Play Framework Template compiling is delayed and crashes

I am controlling Play Framework with sbt and have large troubles compiling
templates. Each time we change a template a compiling takes a
unequivocally prolonged time, runs out of memory sometimes, simply crashes
for opposite reasons, or gets stuck.I edited a build.sbt to assent a
bigger perm size:javaOptions ++= Seq("-XX:PermSize=512M",
"-XX:MaxPermSize=4096M", "-XX:+UseConcMarkSweepGC",
"-XX:+CMSClassUnloadingEnabled")Any suggestions?