Squashed 'third_party/gperftools/' content from commit 54505f1
Change-Id: Id02e833828732b0efe7dac722b8485279e67c5fa
git-subtree-dir: third_party/gperftools
git-subtree-split: 54505f1d50c2d1f4676f5e87090b64a117fd980e
diff --git a/doc/spanmap.dot b/doc/spanmap.dot
new file mode 100644
index 0000000..3cb42ab
--- /dev/null
+++ b/doc/spanmap.dot
@@ -0,0 +1,22 @@
+digraph SpanMap {
+node [shape=box, width=0.3, height=0.3]
+nodesep=.05
+
+map [shape=record, width=6, label="<f0>|<f1>|<f2>|<f3>|<f4>|<f5>|<f6>|<f7>|<f8>|<f9>|<f10>"]
+S0 [label="a"]
+S1 [label="b"]
+S2 [label="c"]
+S3 [label="d"]
+map:f0 -> S0
+map:f1 -> S0
+map:f2 -> S1
+map:f3 -> S2
+map:f4 -> S2
+map:f5 -> S2
+map:f6 -> S2
+map:f7 -> S2
+map:f8 -> S3
+map:f9 -> S3
+map:f10 -> S3
+
+}