diff --git a/bench b/bench
index 394eac7..2f349cf 100755
--- a/bench
+++ b/bench
@@ -17,7 +17,7 @@ bundle update
 NUMBER_OF_RUNS=3
 RESULTS="$(pwd)/results.csv"
 if [[ ! -s $RESULTS ]]; then
-	echo "Jekyll version, user time in seconds, site" > $RESULTS
+	echo "Jekyll version, user time in seconds, site, Maximum memory, Number of file writes, Number of file reads" > $RESULTS
 fi
 
 if [[ -n $PR ]]; then
@@ -65,7 +65,7 @@ for SITE in $(cat "site-list"); do
 		git clone --recurse-submodules -q "$SITE" "$SOURCE"
 	fi
 	for ((i=0; i<NUMBER_OF_RUNS; ++i)); do
-		"$TIME" -ao "$RESULTS" -f"$VERSION,%U,$SITE" \
+		"$TIME" -ao "$RESULTS" -f"$VERSION,%U,$SITE,%M,%O,%I" \
 			bundle exec jekyll build -s "$SOURCE" -d "$DESTINATION" --trace
 	done
 
diff --git a/report b/report
index f0c163e..a22a527 100755
--- a/report
+++ b/report
@@ -52,25 +52,32 @@ end
 
 puts markdown_header if ENV.key?("REF") && ENV.key?("PR")
 
-puts "| ref                                      | build time in seconds |"
-puts "|:-----------------------------------------|----------------------:|"
+puts "| ref                                      | build time in seconds | max memory | min memory |"
+puts "|:-----------------------------------------|----------------------:|-----------:|-----------:|"
 
 summed_results = {}
 site_results = {}
 results.each do |row|
-  summed_results[row[0]] = 0.0 unless summed_results.key?(row[0])
-  site_results[row[2]] ||= {
-    :flamegraph => linkify_flamegraph(row[2]),
-    :site       => linkify_site(row[2]),
+  ref  = row[0]
+  site = row[2]
+  site_results[site] ||= {
+    :flamegraph => linkify_flamegraph(site),
+    :site       => linkify_site(site),
     :time       => 0.0,
   }
-  summed_results[row[0]] += row[1]
-  site_results[row[2]][:time] += row[1] if row[0] == "##{ENV["PR"]}"
+  summed_results[ref] ||= {
+    :ref     => (ref =~ %r!\A(?:[0-9a-f]+|#\d+)\Z!) ? ref : "`#{ref}`",
+    :time    => 0.0,
+    :max_mem => row[3],
+    :min_mem => row[3]
+  }
+  site_results[site][:time ] += row[1] if ref[0] == "##{ENV["PR"]}"
+  summed_results[ref][:time] += row[1]
+  summed_results[ref][:max_mem] = row[3] if row[3] > summed_results[ref][:max_mem]
 end
 
-summed_results.each do |ref, time|
-  ref = "`#{ref}`" unless ref =~ %r!\A(?:[0-9a-f]+|#\d+)\Z!
-  puts format("| %-40s | %21.2f |", ref, time)
+summed_results.each do |ref, data|
+  puts format("| %<ref>-40s | %<time>21.2f | %<max_mem>10d | %<min_mem>10d |", data)
 end
 
 if ENV.key?("REF") && ENV.key?("PR")