diff --git a/Cargo.toml b/Cargo.toml
index 87ae67c..b68fdc8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,7 +9,7 @@ repository = "https://github.com/dtolnay/itoa"
 documentation = "https://docs.rs/itoa"
 categories = ["value-formatting"]
 readme = "README.md"
-exclude = ["performance.png"]
+exclude = ["performance.png", "chart/**"]
 edition = "2018"
 
 [package.metadata.docs.rs]
diff --git a/chart/.gitignore b/chart/.gitignore
new file mode 100644
index 0000000..27572bd
--- /dev/null
+++ b/chart/.gitignore
@@ -0,0 +1,7 @@
+*.aux
+*.fdb_latexmk
+*.fls
+*.log
+*.pdf
+*.png
+*.svg
diff --git a/chart/performance.tex b/chart/performance.tex
new file mode 100644
index 0000000..3ad1ff9
--- /dev/null
+++ b/chart/performance.tex
@@ -0,0 +1,79 @@
+\documentclass{standalone}
+\usepackage{pgfplots}
+\usepackage{sansmath}
+\pgfplotsset{compat=1.16}
+\definecolor{itoa}{HTML}{3366FF}
+\definecolor{std}{HTML}{949494}
+\definecolor{bg}{HTML}{CFCFCF}
+\begin{document}
+\begin{tikzpicture}
+\edef\entries{
+  "$0${\enspace}as{\enspace}i16",
+  "$0${\enspace}as{\enspace}u64",
+  "$-32768${\enspace}as{\enspace}i16",
+  "$4294967295${\enspace}as{\enspace}u64",
+  "$18446744073709551615${\enspace}as{\enspace}u64",
+}
+\begin{axis}[
+  width=5in,
+  height=3.5in,
+  ybar,
+  ymin=0,
+  bar width=18pt,
+  enlarge x limits={abs=31pt},
+  ylabel={nanos for one call to write},
+  legend style={
+    anchor=north west,
+    at={(0.025,0.975)},
+    legend columns=1,
+    draw=none,
+    fill=none,
+  },
+  legend entries={
+    itoa::Buffer::new().format(value)\\
+    std::write!(\&mut buf, ``\{\}'', value)\\
+  },
+  legend cell align=left,
+  xtick={-0.5,0.5,1.5,2.5,3.5,4.5},
+  xticklabels={},
+  xtick pos=left,
+  visualization depends on={y \as \rawy},
+  every node near coord/.append style={
+    shift={(axis direction cs:0,-\rawy/2)},
+    rotate=90,
+    anchor=center,
+    font=\sansmath\sffamily,
+  },
+  axis background/.style={fill=bg},
+  tick label style={font=\sansmath\sffamily},
+  every axis label={font=\sansmath\sffamily},
+  legend style={font=\sansmath\sffamily},
+  label style={font=\sansmath\sffamily},
+]
+  \addplot[
+    black,
+    fill=itoa,
+    area legend,
+    nodes near coords={},
+  ] coordinates {
+    (0, 1)
+    (1, 1)
+    (2, 3)
+    (3, 5)
+    (4, 10)
+  };
+  \addplot[
+    black,
+    fill=std,
+    area legend,
+    nodes near coords=\pgfmathsetmacro{\input}{{\entries}[\coordindex]}\input,
+  ] coordinates {
+    (0, 16)
+    (1, 14)
+    (2, 20)
+    (3, 18)
+    (4, 24)
+  };
+\end{axis}
+\end{tikzpicture}
+\end{document}
diff --git a/performance.png b/performance.png
index 1e23b71..729ee61 100644
Binary files a/performance.png and b/performance.png differ