diff --git a/README.md b/README.md
index 4931d75..5089bb3 100644
--- a/README.md
+++ b/README.md
@@ -158,12 +158,12 @@ Execution time speedup compared to other Go TOML libraries:
         <tr><th>Benchmark</th><th>go-toml v1</th><th>BurntSushi/toml</th></tr>
     </thead>
     <tbody>
-        <tr><td>Marshal/HugoFrontMatter</td><td>2.0x</td><td>2.0x</td></tr>
-        <tr><td>Marshal/ReferenceFile/map</td><td>1.8x</td><td>2.0x</td></tr>
-        <tr><td>Marshal/ReferenceFile/struct</td><td>2.7x</td><td>2.7x</td></tr>
-        <tr><td>Unmarshal/HugoFrontMatter</td><td>3.0x</td><td>2.6x</td></tr>
-        <tr><td>Unmarshal/ReferenceFile/map</td><td>3.0x</td><td>3.1x</td></tr>
-        <tr><td>Unmarshal/ReferenceFile/struct</td><td>5.9x</td><td>6.6x</td></tr>
+        <tr><td>Marshal/HugoFrontMatter-2</td><td>1.9x</td><td>1.9x</td></tr>
+        <tr><td>Marshal/ReferenceFile/map-2</td><td>1.7x</td><td>1.9x</td></tr>
+        <tr><td>Marshal/ReferenceFile/struct-2</td><td>2.4x</td><td>2.6x</td></tr>
+        <tr><td>Unmarshal/HugoFrontMatter-2</td><td>2.9x</td><td>2.5x</td></tr>
+        <tr><td>Unmarshal/ReferenceFile/map-2</td><td>2.7x</td><td>2.6x</td></tr>
+        <tr><td>Unmarshal/ReferenceFile/struct-2</td><td>4.8x</td><td>5.1x</td></tr>
      </tbody>
 </table>
 <details><summary>See more</summary>
@@ -176,16 +176,17 @@ provided for completeness.</p>
         <tr><th>Benchmark</th><th>go-toml v1</th><th>BurntSushi/toml</th></tr>
     </thead>
     <tbody>
-        <tr><td>Marshal/SimpleDocument/map</td><td>1.7x</td><td>2.1x</td></tr>
-        <tr><td>Marshal/SimpleDocument/struct</td><td>2.6x</td><td>2.9x</td></tr>
-        <tr><td>Unmarshal/SimpleDocument/map</td><td>4.1x</td><td>2.9x</td></tr>
-        <tr><td>Unmarshal/SimpleDocument/struct</td><td>6.3x</td><td>4.1x</td></tr>
-        <tr><td>UnmarshalDataset/example</td><td>3.5x</td><td>2.4x</td></tr>
-        <tr><td>UnmarshalDataset/code</td><td>2.2x</td><td>2.8x</td></tr>
-        <tr><td>UnmarshalDataset/twitter</td><td>2.8x</td><td>2.1x</td></tr>
-        <tr><td>UnmarshalDataset/citm_catalog</td><td>2.3x</td><td>1.5x</td></tr>
-        <tr><td>UnmarshalDataset/config</td><td>4.2x</td><td>3.2x</td></tr>
-        <tr><td>[Geo mean]</td><td>3.0x</td><td>2.7x</td></tr>
+        <tr><td>Marshal/SimpleDocument/map-2</td><td>1.7x</td><td>2.1x</td></tr>
+        <tr><td>Marshal/SimpleDocument/struct-2</td><td>2.5x</td><td>2.8x</td></tr>
+        <tr><td>Unmarshal/SimpleDocument/map-2</td><td>4.1x</td><td>3.1x</td></tr>
+        <tr><td>Unmarshal/SimpleDocument/struct-2</td><td>6.4x</td><td>4.3x</td></tr>
+        <tr><td>UnmarshalDataset/example-2</td><td>3.4x</td><td>3.2x</td></tr>
+        <tr><td>UnmarshalDataset/code-2</td><td>2.2x</td><td>2.5x</td></tr>
+        <tr><td>UnmarshalDataset/twitter-2</td><td>2.8x</td><td>2.7x</td></tr>
+        <tr><td>UnmarshalDataset/citm_catalog-2</td><td>2.2x</td><td>2.0x</td></tr>
+        <tr><td>UnmarshalDataset/canada-2</td><td>1.8x</td><td>1.4x</td></tr>
+        <tr><td>UnmarshalDataset/config-2</td><td>4.4x</td><td>2.9x</td></tr>
+        <tr><td>[Geo mean]</td><td>2.8x</td><td>2.6x</td></tr>
      </tbody>
 </table>
 <p>This table can be generated with <code>./ci.sh benchmark -a -html</code>.</p>
diff --git a/ci.sh b/ci.sh
index 3918f53..a617bc0 100755
--- a/ci.sh
+++ b/ci.sh
@@ -140,12 +140,10 @@ bench() {
     if [ "${replace}" != "" ]; then
         find ./benchmark/ -iname '*.go' -exec sed -i -E "s|github.com/pelletier/go-toml/v2|${replace}|g" {} \;
         go get "${replace}"
-        # hack: remove canada.toml.gz because it is not supported by
-        # burntsushi, and replace is only used for benchmark -a
-        rm -f benchmark/testdata/canada.toml.gz
     fi
 
-    go test -bench=. -count=10 ./... | tee "${out}"
+    export GOMAXPROCS=2
+    nice -n -19 taskset --cpu-list 0,1 go test '-bench=^Benchmark(Un)?[mM]arshal' -count=5 -run=Nothing ./... | tee "${out}"
     popd
 
     if [ "${branch}" != "HEAD" ]; then