feat(intruduction): add image with metrics

elfo-rs · Sep 27, 2023 · b484150 · b484150
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diff --git a/src/assets/metrics.png b/src/assets/metrics.png
diff --git a/src/ch01-00-introduction.md b/src/ch01-00-introduction.md
@@ -28,7 +28,9 @@ This book aims to describe a superior approach to build heavily asynchronous and
 * Dumping: messages can be archived for subsequent debugging.
 * Effortless distribution across nodes.
 * Utilities for straightforward testing.
-* Benchmarking utilities **TODO**.
+
+The term "observability" could be better understood through demonstration. Consider, for example, the concept of metrics:
+![](assets/metrics.png)
 
 [elfo]: https://github.com/elfo-rs/elfo
 [metrics]: https://docs.rs/metrics