From 474324726a740e1576a0b7b1930448d1d14564af Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marcel=20M=C3=BCller?= <neikos@neikos.email>
Date: Wed, 11 Mar 2026 18:39:57 +0100
Subject: [PATCH] Add fuzzer for deeply nested parsing
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Signed-off-by: Marcel Müller <neikos@neikos.email>
---
 benches/parsing.rs | 23 ++++++++++++++++++++++-
 fuzz/Cargo.lock    |  2 --
 2 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/benches/parsing.rs b/benches/parsing.rs
index f7e3da0..35de7ae 100644
--- a/benches/parsing.rs
+++ b/benches/parsing.rs
@@ -23,5 +23,26 @@ fn parsing_benchmark(c: &mut Criterion) {
     }
 }
 
-criterion_group!(benches, parsing_benchmark);
+fn parsing_nested(c: &mut Criterion) {
+    let mut parsing = c.benchmark_group("Parsing");
+
+    for size in [1, 2, 8, 12] {
+        let mut input = String::new();
+
+        for _ in 0..size {
+            input = format!(
+                "{{{{ for foo in bar }}}} {input} {{{{ if foo }}}} Hi! {input} {{{{ end }}}} Yooo {{{{ end }}}}"
+            );
+        }
+
+        let input = NomoInput::from(input);
+
+        parsing.throughput(criterion::Throughput::Bytes(input.len() as u64));
+        parsing.bench_with_input(BenchmarkId::from_parameter(size), &input, |b, input| {
+            b.iter(|| nomo::parser::parse(input.clone()).unwrap());
+        });
+    }
+}
+
+criterion_group!(benches, parsing_benchmark, parsing_nested);
 criterion_main!(benches);
diff --git a/fuzz/Cargo.lock b/fuzz/Cargo.lock
index 2b28a53..ee307ed 100644
--- a/fuzz/Cargo.lock
+++ b/fuzz/Cargo.lock
@@ -116,7 +116,6 @@ version = "0.1.0"
 dependencies = [
  "annotate-snippets",
  "displaydoc",
- "serde",
  "serde_json",
  "thiserror",
  "winnow",
@@ -161,7 +160,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9a8e94ea7f378bd32cbbd37198a4a91436180c5bb472411e48b5ec2e2124ae9e"
 dependencies = [
  "serde_core",
- "serde_derive",
 ]
 
 [[package]]