Add a microbenchmark for compile-time builtins

Author: fitzgen

Cargo.lock

@@ -131,6 +131,7 @@ pulley-interpreter = { workspace = true, features = ["disas"] }
 wasm-encoder = { workspace = true }
 cranelift-native = { workspace = true }
 futures = { workspace = true }
+rand = { workspace = true }
 
 # Should only be used for tests that are explicitly testing `anyhow::Error` and
 # `wasmtime::Error` integration and conversion. Otherwise, always prefer to use
@@ -626,6 +627,10 @@ required-features = ["wasi-common/tokio"]
 name = "compile"
 harness = false
 
+[[bench]]
+name = "compile_time_builtins"
+harness = false
+
 [[bench]]
 name = "instantiation"
 harness = false