Add parser benchmark

Cargo.toml

@@ -28,3 +28,10 @@ tree-sitter = "~0.20.3"
 
 [build-dependencies]
 cc = "1.0"
+
+[dev-dependencies]
+criterion = { version = "0.3.5", features = ["html_reports"] }
+
+[[bench]]
+name = "bench_main"
+harness = false

benches/bench_main.rs

@@ -0,0 +1,23 @@
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+
+static CODE: &str = include_str!(r#"../examples/texlab.tex"#);
+
+fn criterion_benchmark(c: &mut Criterion) {
+    let mut parser = tree_sitter::Parser::new();
+    parser.set_language(tree_sitter_latex::language()).unwrap();
+
+    c.bench_function("Init", |b| {
+        b.iter(|| {
+            let mut parser = tree_sitter::Parser::new();
+            parser.set_language(tree_sitter_latex::language()).unwrap();
+            parser
+        });
+    });
+
+    c.bench_function("Parse", |b| {
+        b.iter_with_large_drop(|| parser.parse(black_box(CODE), None).unwrap());
+    });
+}
+
+criterion_group!(benches, criterion_benchmark);
+criterion_main!(benches);

examples/texlab.tex

@@ -0,0 +1,78 @@
+\documentclass{article}
+\usepackage[utf8]{inputenc}
+\usepackage{hyperref}
+
+\date{\today}
+\author{Eric Förster \and Patrick Förster}
+\title{\TeX{}Lab}
+
+\begin{document}
+
+\maketitle{}
+
+\section{Introduction}
+
+TexLab is a cross-platform implementation of the
+\href{https://microsoft.github.io/language-server-protocol/specifications/specification-current/}{Language Server Protocol}
+for the \LaTeX{} typesetting system.
+It aims to produce high quality code completion results.
+The server may be used with any editor that implements the Language Server Protocol.
+It is written in Rust, a blazingly fast systems programming language.
+
+\section{Features}
+
+The language server implements most of the Language Server Protocol specification.
+In addition to that, it implements additional functionality like
+building and forward search.
+
+\section{Availability}
+
+TexLab is available on \href{https://github.com/latex-lsp/texlab}{GitHub},
+various package managers and CTAN\@. 
+Pre-compiled binaries are available on the 
+\href{https://github.com/latex-lsp/texlab/releases}{GitHub Releases} page.
+Some editor extensions are able to automatically download TexLab.
+
+\section{Installation}
+
+There are various ways to install TexLab:
+\begin{itemize}
+    \item 
+        TexLab is included in some package managers like \texttt{brew},
+        \texttt{pacman} and \texttt{scoop}.
+        Please refer to the badges in the README to see if your package manager
+        includes TexLab.
+    \item
+        You can download a pre-compiled binary from our 
+        \href{https://github.com/latex-lsp/texlab/releases}{GitHub Releases} page.
+    \item
+        Some extensions like the Visual Studio Code extension or
+        \texttt{coc-texlab} can automatically download the server for you.
+    \item
+        You can download the sources from either GitHub or CTAN
+        and compile the server with \texttt{cargo build --release}.
+        The \texttt{texlab} binary can be found inside \texttt{target/release}.    
+\end{itemize}
+
+\section{Usage}
+
+\subsection{Synopsis}
+
+\texttt{texlab [FLAGS] [OPTIONS]}
+
+\subsection{Flags}
+
+\begin{itemize}
+    \item \texttt{-h}, \texttt{--help} Prints help information
+    \item \texttt{-q}, \texttt{--quiet} No output printed to stderr
+    \item \texttt{-V}, \texttt{--version} Prints version information
+    \item \texttt{-v}, \texttt{--verbosity} Increase message verbosity (\texttt{-vvvv} for max verbosity)
+\end{itemize}
+
+\subsection{Options}
+
+\begin{itemize}
+    \item \texttt{--log-file <FILE>} WRite the logging output to \texttt{FILE}
+\end{itemize}
+
+\end{document}