chore(starknet_gateway): create bench file for benchmark test

crates/starknet_gateway/Cargo.toml

@@ -39,6 +39,7 @@ validator.workspace = true
 [dev-dependencies]
 assert_matches.workspace = true
 cairo-lang-sierra-to-casm.workspace = true
+criterion.workspace = true
 mockall.workspace = true
 mockito.workspace = true
 num-bigint.workspace = true
@@ -49,3 +50,8 @@ rstest.workspace = true
 starknet_mempool.workspace = true
 starknet_mempool_types = { workspace = true, features = ["testing"] }
 tracing-test.workspace = true
+
+[[bench]]
+harness = false
+name = "gateway_bench"
+path = "bench/gateway_bench.rs"

crates/starknet_gateway/bench/gateway_bench.rs

@@ -0,0 +1,37 @@
+//! Benchmark module for the starknet gateway crate. It provides functionalities to benchmark
+//! the performance of the gateway service, including declare, deploy account and invoke
+//! transactions.
+//!
+//! There are four benchmark functions in this flow: `declare_benchmark`,
+//! `deploy_account_benchmark`, `invoke_benchmark` and `gateway_benchmark` which combines all of the
+//! types. Each of the functions measure the performance of the gateway handling randomly created
+//! txs of the respective type.
+//!
+//! Run the benchmarks using `cargo bench --bench gateway_bench`.
+
+use criterion::{criterion_group, criterion_main, Criterion};
+
+pub fn declare_benchmark(c: &mut Criterion) {
+    c.bench_function("declares", |benchmark| benchmark.iter(|| {}));
+}
+
+pub fn deploy_account_benchmark(c: &mut Criterion) {
+    c.bench_function("deploy_accounts", |benchmark| benchmark.iter(|| {}));
+}
+
+pub fn invoke_benchmark(c: &mut Criterion) {
+    c.bench_function("invokes", |benchmark| benchmark.iter(|| {}));
+}
+
+pub fn gateway_benchmark(c: &mut Criterion) {
+    c.bench_function("all_transaction_types", |benchmark| benchmark.iter(|| {}));
+}
+
+criterion_group!(
+    benches,
+    declare_benchmark,
+    deploy_account_benchmark,
+    invoke_benchmark,
+    gateway_benchmark
+);
+criterion_main!(benches);