cherry-pick from upstream polkadot-sdk/bkchr-wasmtime-increase-instan…

…ce-count

contains commits:
- 2ffeb6e
- a1047ee

substrate/client/cli/src/params/runtime_params.rs

@@ -22,7 +22,7 @@ use std::str::FromStr;
 /// Parameters used to config runtime.
 #[derive(Debug, Clone, Args)]
 pub struct RuntimeParams {
-	/// The size of the instances cache for each runtime. The values higher than 256 are illegal.
+	/// The size of the instances cache for each runtime. The values higher than 32 are illegal.
 	#[arg(long, default_value_t = 8, value_parser = parse_max_runtime_instances)]
 	pub max_runtime_instances: usize,
 
@@ -35,8 +35,8 @@ fn parse_max_runtime_instances(s: &str) -> Result<usize, String> {
 	let max_runtime_instances = usize::from_str(s)
 		.map_err(|_err| format!("Illegal `--max-runtime-instances` value: {s}"))?;
 
-	if max_runtime_instances > 256 {
-		Err(format!("Illegal `--max-runtime-instances` value: {max_runtime_instances} is more than the allowed maximum of `256` "))
+	if max_runtime_instances > 32 {
+		Err(format!("Illegal `--max-runtime-instances` value: {max_runtime_instances} is more than the allowed maximum of `32` "))
 	} else {
 		Ok(max_runtime_instances)
 	}

substrate/client/executor/wasmtime/src/runtime.rs

@@ -379,7 +379,7 @@ fn common_config(semantics: &Semantics) -> std::result::Result<wasmtime::Config,
 			.instance_memories(1)
 			// This determines how many instances of the module can be
 			// instantiated in parallel from the same `Module`.
-			.instance_count(32);
+			.instance_count(64);
 
 		config.allocation_strategy(wasmtime::InstanceAllocationStrategy::Pooling(pooling_config));
 	}