Check performance overhead

Author: liufengyun

bench/profiles/projects.yml

@@ -26,10 +26,10 @@ charts:
 
 scripts:
     dotty:
-        - measure -feature -deprecation -unchecked -Xfatal-warnings -encoding UTF8 -language:implicitConversions -Yexplicit-nulls -with-compiler $(find $PROG_HOME/dotty/compiler/src/dotty -name *.scala -o -name *.java)
+        - measure -feature -deprecation -unchecked -Xfatal-warnings -encoding UTF8 -language:implicitConversions -Yexplicit-nulls -Ysafe-init -with-compiler $(find $PROG_HOME/dotty/compiler/src/dotty -name *.scala -o -name *.java)
 
     re2s:
-        - measure $(find $PROG_HOME/tests/re2s/src -name *.scala)
+        - measure -Ysafe-init $(find $PROG_HOME/tests/re2s/src -name *.scala)
 
     # scalapb:
     #    - source $PROG_HOME/dotty/bench/scripts/scalapb

bench/scripts/scalap

@@ -2,4 +2,4 @@ set -e
 
 path=$(cs fetch -p org.scala-lang:scala-compiler:2.13.0)
 
-measure -source 3.0-migration -classpath "$path" $(find $PROG_HOME/dotty/community-build/community-projects/scalap/src/scalap -name "*.scala")
+measure -source 3.0-migration -classpath "$path" -Ysafe-init $(find $PROG_HOME/dotty/community-build/community-projects/scalap/src/scalap -name "*.scala")

bench/scripts/stdlib213

@@ -3,5 +3,5 @@ set -e
 pattern="! -name AnyVal.scala ! -name language.scala -name *.scala -o -name *.java"
 stdlib213=$(find $PROG_HOME/dotty/community-build/community-projects/stdLib213/src/library/scala $pattern)
 cd $PROG_HOME/dotty
-measure -language:implicitConversions $stdlib213
+measure -language:implicitConversions -Ysafe-init $stdlib213