Perf: Add metrics to facilitate performance testing.

Cargo.toml

@@ -14,6 +14,9 @@ default-members = ["crates/revm"]
 all-features = true
 rustdoc-args = ["--cfg", "docsrs"]
 
+[workspace.dependencies]
+revm-utils = { git = "https://github.com/megaeth-labs/reth-perf-utils.git" }
+
 [profile.release]
 lto = true
 codegen-units = 1

crates/interpreter/Cargo.toml

@@ -21,6 +21,7 @@ serde = { version = "1.0", default-features = false, features = [
     "derive",
     "rc",
 ], optional = true }
+revm-utils = { workspace = true, optional = true }
 
 [features]
 default = ["std"]
@@ -55,3 +56,5 @@ optional_eip3607 = ["revm-primitives/optional_eip3607"]
 optional_gas_refund = ["revm-primitives/optional_gas_refund"]
 optional_no_base_fee = ["revm-primitives/optional_no_base_fee"]
 optional_beneficiary_reward = ["revm-primitives/optional_beneficiary_reward"]
+enable_opcode_metrics = ["revm-utils"]
+enable_cache_record = ["revm-primitives/enable_cache_record"]

crates/interpreter/src/instructions/arithmetic.rs

@@ -67,7 +67,10 @@ pub fn mulmod<H: Host>(interpreter: &mut Interpreter, _host: &mut H) {
 
 pub fn exp<H: Host, SPEC: Spec>(interpreter: &mut Interpreter, _host: &mut H) {
     pop_top!(interpreter, op1, op2);
-    gas_or_fail!(interpreter, gas::exp_cost::<SPEC>(*op2));
+    let cost = gas::exp_cost::<SPEC>(*op2);
+    gas_or_fail!(interpreter, cost);
+    #[cfg(feature = "enable_opcode_metrics")]
+    revm_utils::metrics::record_gas(crate::opcode::EXP, cost.unwrap_or(0));
     *op2 = op1.pow(*op2);
 }