From dfc08ff2c6580bbeb3951b223e0332546ba3b0d9 Mon Sep 17 00:00:00 2001
From: Greg Brown <gmb60@cam.ac.uk>
Date: Thu, 6 May 2021 19:40:59 +0100
Subject: Introduce lambda expressions.

---
 autochomp/benches/parse/main.rs | 64 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 autochomp/benches/parse/main.rs

(limited to 'autochomp/benches/parse/main.rs')

diff --git a/autochomp/benches/parse/main.rs b/autochomp/benches/parse/main.rs
new file mode 100644
index 0000000..64fd88a
--- /dev/null
+++ b/autochomp/benches/parse/main.rs
@@ -0,0 +1,64 @@
+use std::error::Error;
+
+use chewed::{IterWrapper, Parser};
+use chomp::{
+    chomp::ast::NamedExpression,
+    nibble::{
+        self,
+        convert::{Context, Convert},
+    },
+};
+use criterion::{
+    criterion_group, criterion_main, AxisScale, BenchmarkId, Criterion, PlotConfiguration,
+    Throughput,
+};
+
+const INPUTS: &[&str] = &[
+    include_str!("data/12.nb"),
+    include_str!("data/24.nb"),
+    include_str!("data/48.nb"),
+    include_str!("data/97.nb"),
+    include_str!("data/194.nb"),
+    include_str!("data/387.nb"),
+    include_str!("data/774.nb"),
+    include_str!("data/1548.nb"),
+    include_str!("data/3096.nb"),
+
+];
+
+fn parse_autochomp(input: &str) -> Result<NamedExpression, Box<dyn Error>> {
+    IterWrapper::new(input.chars())
+        .parse::<autochomp::Ast>()
+        .map_err(|e| Box::new(e) as Box<dyn Error>)
+        .and_then(|ast| {
+            ast.convert(&mut Context::default())
+                .map_err(|e| Box::new(e) as Box<dyn Error>)
+        })
+}
+
+fn parse_chomp(input: &str) -> Result<NamedExpression, Box<dyn Error>> {
+    syn::parse_str::<nibble::Statement>(input)
+        .map_err(|e| Box::new(e) as Box<dyn Error>)
+        .and_then(|stmt| {
+            stmt.convert(&mut Context::default())
+                .map_err(|e| Box::new(e) as Box<dyn Error>)
+        })
+}
+
+fn bench_parse(c: &mut Criterion) {
+    let plot_config = PlotConfiguration::default().summary_scale(AxisScale::Logarithmic);
+    let mut group = c.benchmark_group("Parse");
+    group.plot_config(plot_config);
+    for (i, input) in INPUTS.iter().enumerate() {
+        group.throughput(Throughput::Bytes(input.len() as u64));
+        group.bench_with_input(BenchmarkId::new("Chomp", i), *input, |b, i| {
+            b.iter(|| parse_chomp(i))
+        });
+        group.bench_with_input(BenchmarkId::new("AutoChomp", i), *input, |b, i| {
+            b.iter(|| parse_autochomp(i))
+        });
+    }
+}
+
+criterion_group!(benches, bench_parse);
+criterion_main!(benches);
-- 
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