diff --git a/.github/workflows/benchmark.yaml b/.github/workflows/benchmark.yaml
new file mode 100644
index 0000000..4e9f1a7
--- /dev/null
+++ b/.github/workflows/benchmark.yaml
@@ -0,0 +1,18 @@
+name: benchmark
+
+on:
+    push:
+jobs:
+    build:
+        runs-on: ubuntu-latest
+        steps:
+        - uses: actions/checkout@v1
+        - name: take benchmarks
+          run: |
+              ./benchmark/gendoc.sh
+        - name: upload to wiki
+          uses: SwiftDocOrg/github-wiki-publish-action@v1
+          with:
+            path: "documentation"
+          env:
+            GH_PERSONAL_ACCESS_TOKEN: ${{ secrets.GH_PERSONAL_ACCESS_TOKEN }}
diff --git a/benchmark/gendoc.sh b/benchmark/gendoc.sh
new file mode 100755
index 0000000..b19a2aa
--- /dev/null
+++ b/benchmark/gendoc.sh
@@ -0,0 +1,35 @@
+#!/bin/bash
+
+mkdir -p document
+
+FILE=document/benchmark.md
+TARGETS="i386-linux-handwritten c python"
+TIMEFORMAT='%U'
+function benchmark () {
+    sum=0
+    for i in `seq $2`; do
+        t=`{ eval $1; } 2>&1`
+        sum=`echo $t + $sum | bc`
+    done
+    average=`echo "scale=3; $sum / $2" | bc | xargs printf "%.3f"`
+    echo $average
+}
+
+function bootstrap {
+    time ./planck < bootstrap.fs benchmark/nop.fs 2>&1 > /dev/null
+}
+
+function generate-table {
+    echo "## $1"
+    echo
+    echo "| implementation | sec |"
+    echo "|:---------------|----:|"
+    for impl in $TARGETS; do
+        make $impl 2>&1 > /dev/null
+        t=`benchmark $2 $3`
+        echo "| $impl | $t |"
+    done
+}
+
+echo "# Benchmarks" >> $FILE
+generate-table "Bootstrap Time" bootstrap 5
diff --git a/benchmark/nop.fs b/benchmark/nop.fs
new file mode 100644
index 0000000..e69de29