Use CLI to configure max instances cache (#5177)

* Use CLI to configure max instances cache

* Fix tests

* Move default value into CLI

* Use SmallVec

* Apply review comments

* Get rid of `SmallVec`

Co-authored-by: Bastian Köcher <git@kchr.de>

substrate/bin/node/executor/benches/bench.rs

@@ -170,7 +170,8 @@ fn bench_execute_block(c: &mut Criterion) {
 				ExecutionMethod::Native => (true, WasmExecutionMethod::Interpreted),
 				ExecutionMethod::Wasm(wasm_method) => (false, *wasm_method),
 			};
-			let executor = NativeExecutor::new(wasm_method, None);
+
+			let executor = NativeExecutor::new(wasm_method, None, 8);
 			let runtime_code = RuntimeCode {
 				code_fetcher: &sp_core::traits::WrappedRuntimeCode(COMPACT_CODE.into()),
 				hash: vec![1, 2, 3],

substrate/bin/node/executor/tests/common.rs

@@ -58,7 +58,7 @@ pub fn from_block_number(n: u32) -> Header {
 }
 
 pub fn executor() -> NativeExecutor<Executor> {
-	NativeExecutor::new(WasmExecutionMethod::Interpreted, None)
+	NativeExecutor::new(WasmExecutionMethod::Interpreted, None, 8)
 }
 
 pub fn executor_call<

substrate/bin/node/runtime/src/lib.rs

@@ -83,7 +83,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	// implementation changes and behavior does not, then leave spec_version as
 	// is and increment impl_version.
 	spec_version: 235,
-	impl_version: 0,
+	impl_version: 1,
 	apis: RUNTIME_API_VERSIONS,
 };
 

substrate/bin/node/testing/src/bench.rs

@@ -150,7 +150,7 @@ impl BenchDb {
 
 		let (client, backend) = sc_client_db::new_client(
 			db_config,
-			NativeExecutor::new(WasmExecutionMethod::Compiled, None),
+			NativeExecutor::new(WasmExecutionMethod::Compiled, None, 8),
 			&keyring.generate_genesis(),
 			None,
 			None,