diff --git a/script/stackprof b/script/stackprof
index e0e2d4db..3399616f 100755
--- a/script/stackprof
+++ b/script/stackprof
@@ -6,11 +6,11 @@ export BENCHMARK=true
 command -v stackprof > /dev/null || script/bootstrap
 
 TEST_SCRIPT="Jekyll::Commands::Build.process({'source' => 'site'})"
-PROF_OUTPUT_FILE=tmp/stackprof-$(date +%Y%m%d).dump
+PROF_OUTPUT_FILE=tmp/stackprof-$(date +%Y%m%d%H%M).dump
 
 test -f "$PROF_OUTPUT_FILE" || {
   bundle exec ruby -r./lib/jekyll -rstackprof \
-    -e "StackProf.run(mode: :cpu, out: '${PROF_OUTPUT_FILE}') { ${TEST_SCRIPT} }"
+    -e "StackProf.run(mode: :cpu, interval: 100, out: '${PROF_OUTPUT_FILE}') { ${TEST_SCRIPT} }"
 }
 
 bundle exec stackprof $PROF_OUTPUT_FILE $@