diff --git a/bench/bench.sh b/bench/bench.sh
new file mode 100644
index 0000000..6aa1e24
--- /dev/null
+++ b/bench/bench.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+
+DIR=$(cd $(dirname $BASH_SOURCE); pwd)
+
+gotest() {
+    cpu=${3:-$(nproc)}
+    go test -bench "$1" -benchmem -benchtime 5s -cpu $cpu . \
+        | tee "$2"
+}
+
+(
+    cd $DIR
+    gotest BenchmarkFilter_Volumes filter-volumes.txt
+    gotest BenchmarkFilter_Compare filter-compare-8.txt
+    gotest BenchmarkFilter_Compare filter-compare-1.txt 1
+)
diff --git a/bench/filter-compare-1.txt b/bench/filter-compare-1.txt
new file mode 100644
index 0000000..96e1007
--- /dev/null
+++ b/bench/filter-compare-1.txt
@@ -0,0 +1,10 @@
+goos: linux
+goarch: amd64
+pkg: github.com/meian/gcf/bench
+cpu: Intel(R) Core(TM) i5-8250U CPU @ 1.60GHz
+BenchmarkFilter_Compare/filter         	 2338778	      2547 ns/op	     144 B/op	       4 allocs/op
+BenchmarkFilter_Compare/if-func        	 9481165	       620.8 ns/op	       0 B/op	       0 allocs/op
+BenchmarkFilter_Compare/if-inline      	155062731	        38.53 ns/op	       0 B/op	       0 allocs/op
+BenchmarkFilter_Compare/chan           	   76498	     78090 ns/op	     384 B/op	       6 allocs/op
+PASS
+ok  	github.com/meian/gcf/bench	31.790s
diff --git a/bench/filter-compare-8.txt b/bench/filter-compare-8.txt
new file mode 100644
index 0000000..ae5dcbd
--- /dev/null
+++ b/bench/filter-compare-8.txt
@@ -0,0 +1,10 @@
+goos: linux
+goarch: amd64
+pkg: github.com/meian/gcf/bench
+cpu: Intel(R) Core(TM) i5-8250U CPU @ 1.60GHz
+BenchmarkFilter_Compare/filter-8         	 2325522	      2551 ns/op	     144 B/op	       4 allocs/op
+BenchmarkFilter_Compare/if-func-8        	 9611860	       643.7 ns/op	       0 B/op	       0 allocs/op
+BenchmarkFilter_Compare/if-inline-8      	155326840	        38.86 ns/op	       0 B/op	       0 allocs/op
+BenchmarkFilter_Compare/chan-8           	   41066	    151074 ns/op	     384 B/op	       6 allocs/op
+PASS
+ok  	github.com/meian/gcf/bench	33.025s
diff --git a/bench/filter-volumes.txt b/bench/filter-volumes.txt
new file mode 100644
index 0000000..6b2c266
--- /dev/null
+++ b/bench/filter-volumes.txt
@@ -0,0 +1,18 @@
+goos: linux
+goarch: amd64
+pkg: github.com/meian/gcf/bench
+cpu: Intel(R) Core(TM) i5-8250U CPU @ 1.60GHz
+BenchmarkFilter_Volumes/slice=10/filter=1-8         	28708957	       200.3 ns/op	      80 B/op	       2 allocs/op
+BenchmarkFilter_Volumes/slice=10/filter=5-8         	 8568411	       694.7 ns/op	     208 B/op	       6 allocs/op
+BenchmarkFilter_Volumes/slice=10/filter=10-8        	 4603394	      1299 ns/op	     368 B/op	      11 allocs/op
+BenchmarkFilter_Volumes/slice=10/filter=100-8       	  490940	     11025 ns/op	    3248 B/op	     101 allocs/op
+BenchmarkFilter_Volumes/slice=100/filter=1-8        	 5878351	      1015 ns/op	      80 B/op	       2 allocs/op
+BenchmarkFilter_Volumes/slice=100/filter=5-8        	 1290842	      4663 ns/op	     208 B/op	       6 allocs/op
+BenchmarkFilter_Volumes/slice=100/filter=10-8       	  698023	      8287 ns/op	     368 B/op	      11 allocs/op
+BenchmarkFilter_Volumes/slice=100/filter=100-8      	   87264	     67737 ns/op	    3248 B/op	     101 allocs/op
+BenchmarkFilter_Volumes/slice=1000/filter=1-8       	  598560	      9192 ns/op	      80 B/op	       2 allocs/op
+BenchmarkFilter_Volumes/slice=1000/filter=5-8       	  157719	     44673 ns/op	     208 B/op	       6 allocs/op
+BenchmarkFilter_Volumes/slice=1000/filter=10-8      	   81381	     78245 ns/op	     368 B/op	      11 allocs/op
+BenchmarkFilter_Volumes/slice=1000/filter=100-8     	    8083	    636071 ns/op	    3248 B/op	     101 allocs/op
+PASS
+ok  	github.com/meian/gcf/bench	81.086s