perf: Add logging benchmark

Author: michaelmior

Cargo.toml

@@ -28,6 +28,10 @@ tempfile = "3.10.1"
 name = "db"
 harness = false
 
+[[bench]]
+name = "logging"
+harness = false
+
 [[bin]]
 name = "argusdb"
 path = "src/bin/argusdb.rs"

benches/logging.rs

@@ -0,0 +1,32 @@
+use argusdb::log::{Logger, Operation};
+use criterion::{Criterion, criterion_group, criterion_main};
+use tempfile::tempdir;
+
+fn logging_benchmark(c: &mut Criterion) {
+    let mut group = c.benchmark_group("logging");
+    group.sample_size(10);
+
+    group.bench_function("write_log_entry", |b| {
+        b.iter_custom(|iters| {
+            let dir = tempdir().unwrap();
+            let log_path = dir.path().join("test.log");
+            let mut logger = Logger::new(&log_path, 1024 * 1024).unwrap(); // 1MB rotation threshold
+            let start = std::time::Instant::now();
+            for _ in 0..iters {
+                let op = Operation::Insert {
+                    id: "test_doc_id".to_string(),
+                    doc: serde_json::json!({"key": "value"}),
+                };
+
+                logger.log(op).unwrap();
+            }
+
+            start.elapsed()
+        })
+    });
+
+    group.finish();
+}
+
+criterion_group!(benches, logging_benchmark);
+criterion_main!(benches);