fix: update benchmarks to use available test fixtures

- Add parse_str method to Parser
- Update benchmark to use existing fixtures or minimal inline XBRL
- Remove unused crabrl_bench.rs

benches/parser.rs

@@ -1,23 +1,37 @@
 use crabrl::Parser;
 use criterion::{black_box, criterion_group, criterion_main, Criterion};
+use std::path::Path;
 
-fn parse_small_file(c: &mut Criterion) {
+fn parse_sample_sec_file(c: &mut Criterion) {
     let parser = Parser::new();
-    let content = include_bytes!("../tests/fixtures/small.xml");
-
-    c.bench_function("parse_small", |b| {
-        b.iter(|| parser.parse_bytes(black_box(content)));
-    });
+    let sample_file = Path::new("fixtures/sample-sec.xml");
+    
+    if sample_file.exists() {
+        c.bench_function("parse_sample_sec", |b| {
+            b.iter(|| parser.parse_file(black_box(&sample_file)));
+        });
+    } else {
+        // If no fixtures exist, use a minimal inline XBRL for benchmarking
+        let minimal_xbrl = r#"<?xml version="1.0" encoding="UTF-8"?>
+<xbrl xmlns="http://www.xbrl.org/2003/instance">
+  <context id="ctx1">
+    <entity>
+      <identifier scheme="http://www.sec.gov/CIK">0000000000</identifier>
+    </entity>
+    <period>
+      <instant>2023-12-31</instant>
+    </period>
+  </context>
+  <unit id="usd">
+    <measure>iso4217:USD</measure>
+  </unit>
+</xbrl>"#;
+        
+        c.bench_function("parse_minimal", |b| {
+            b.iter(|| parser.parse_str(black_box(minimal_xbrl)));
+        });
+    }
 }
 
-fn parse_medium_file(c: &mut Criterion) {
-    let parser = Parser::new();
-    let content = include_bytes!("../tests/fixtures/medium.xml");
-
-    c.bench_function("parse_medium", |b| {
-        b.iter(|| parser.parse_bytes(black_box(content)));
-    });
-}
-
-criterion_group!(benches, parse_small_file, parse_medium_file);
+criterion_group!(benches, parse_sample_sec_file);
 criterion_main!(benches);