DOC: Detail external plugins

docs/source/bplugin-list.md

@@ -0,0 +1,10 @@
+# External Plugin List
+
+Here are the existing external plugins which are supported by `asv` and
+`asv_runner` (pull requests welcome).
+
+## Benchmark Plugins
+
+- [`asv_bench_memray`](https://haozeke.github.io/asv_bench_memray/) enables
+  `RayMyClass` or `ray_funcname` for peak memory as profiled by `memray`, which
+  is able to handle native calls and traces every function call

docs/source/development/benchmark_plugins.md

@@ -0,0 +1,9 @@
+# Developing benchmarks
+
+All benchmark plugins must follow a strict hierarchy:
+
+- The package name must begin with `asv_bench`.
+- Benchmark classes are defined in a `benchmarks` folder under the package module.
+- Each exported new benchmark type has the `export_as_benchmark = [NAMEBenchmark]` attribute.
+
+For more conventions, see the internally defined benchmark types within `asv_runner`.

docs/source/index.md

@@ -23,6 +23,7 @@ measure and analyze the performance of your Python packages.
 :caption: Contents
 
 apidocs/index
+bplugin-list
 ```
 
 ## Indices and tables