diff --git a/.gitignore b/.gitignore
index 2f524bed03..e616e75129 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,12 +27,16 @@ d8
 d8_g
 shell
 shell_g
+/_*
 /build/Debug
 /build/gyp
 /build/ipch/
 /build/Release
+/hydrogen.cfg
 /obj
 /out
+/perf.data
+/perf.data.old
 /test/cctest/cctest.status2
 /test/message/message.status2
 /test/mjsunit/mjsunit.status2
@@ -52,6 +56,7 @@ shell_g
 /tools/oom_dump/oom_dump.o
 /tools/visual_studio/Debug
 /tools/visual_studio/Release
+/v8.log.ll
 /xcodebuild
 TAGS
 *.Makefile
@@ -59,4 +64,3 @@ GTAGS
 GRTAGS
 GSYMS
 GPATH
-/_*