diff --git a/.gitpod.dockerfile b/.gitpod.dockerfile
new file mode 100644
index 000000000..448b5f80b
--- /dev/null
+++ b/.gitpod.dockerfile
@@ -0,0 +1,5 @@
+FROM gitpod/workspace-full:latest
+
+RUN bash -c ". .nvm/nvm.sh && nvm install 12 && nvm use 12 && nvm alias default 12"
+
+RUN echo "nvm use default &>/dev/null" >> ~/.bashrc.d/51-nvm-fix
diff --git a/.gitpod.yml b/.gitpod.yml
new file mode 100644
index 000000000..9a7f2e6ec
--- /dev/null
+++ b/.gitpod.yml
@@ -0,0 +1,7 @@
+image:
+ file: .gitpod.Dockerfile
+tasks:
+ - init: npm install && npm run build
+vscode:
+ extensions:
+ - dbaeumer.vscode-eslint
diff --git a/README.md b/README.md
index 6bb19870a..9c2a3089e 100644
--- a/README.md
+++ b/README.md
@@ -516,6 +516,43 @@ If the amplitude is not acceptable, please prepare a stable environment to run b
GitHub action supports [self-hosted runners](https://docs.github.com/en/actions/hosting-your-own-runners/about-self-hosted-runners).
+### Supplement historic benchmark results manually
+
+If you have started to collect benchmark results at a certain stage of your project but now also would like to compare these results to older historic values, this tool also allows you to check in these historic data at a later point in time so they will appear in the GitHub Pages graphs as well:
+
+1. Create the historic data yourself, and append the hash of the relevant commit to its name (e.g., `benchmark-data-e1d6443a1e89280d0ade9bf2d81050f17c50189b.json`).
+2. Clone & install this repository:
+ ```shell
+ git clone https://github.com/benchmark-action/github-action-benchmark.git
+ cd github-action-benchmark
+ npm install && npm build
+ ```
+3. In your repository folder, create a file that contains the **full** configuration of your job configuration. You can retrieve this config from the job log of any prior workflow run under the `with:` key in line 2 of the step log. For instance, create a file named `config.yml` that looks like this:
+ config.yml
tool: customSmallerIsBetter
+ output-file-path: benchmark-data.json
+ auto-push: true
+ gh-pages-branch: gh-pages
+ comment-always: false
+ fail-on-alert: true
+ name: Benchmark
+ benchmark-data-dir-path: dev/bench
+ skip-fetch-gh-pages: false
+ save-data-file: true
+ comment-on-alert: false
+ alert-threshold: 200%
+ github-token: ''
+