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block.md

@@ -2,6 +2,30 @@ This document was last updated for `go1.15.7` but probably still applies to olde
 
 # Block Profiling in Go
 
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+
+- [Block Profiling in Go](#block-profiling-in-go)
+  * [Description](#description)
+  * [Usage](#usage)
+  * [Overhead](#overhead)
+    + [Implementation Details](#implementation-details)
+    + [Benchmarks](#benchmarks)
+    + [Memory Usage](#memory-usage)
+    + [Initialization Time](#initialization-time)
+  * [Accuracy](#accuracy)
+    + [Sampling Bias](#sampling-bias)
+      - [Simple Example](#simple-example)
+      - [Simulation & Proposal for Improvement](#simulation---proposal-for-improvement)
+    + [Time Stamp Counter](#time-stamp-counter)
+    + [Stack Depth](#stack-depth)
+    + [Spin Locks](#spin-locks)
+  * [Relationship with Wall Clock Time](#relationship-with-wall-clock-time)
+  * [Relationship with Mutex Profiling](#relationship-with-mutex-profiling)
+  * [Profiler Labels](#profiler-labels)
+  * [pprof Output](#pprof-output)
+  * [History](#history)
+  * [Disclaimers](#disclaimers)
+
 ## Description
 
 The block profile in Go lets you analyze how much time your program spends waiting on the blocking operations listed below: