Add way to look at tx instructions (#11943)

sdk/benches/serialize_instructions.rs

@@ -0,0 +1,63 @@
+#![feature(test)]
+
+extern crate test;
+use bincode::{deserialize, serialize};
+use solana_sdk::instruction::{AccountMeta, Instruction};
+use solana_sdk::message::Message;
+use solana_sdk::pubkey::Pubkey;
+use solana_sdk::sysvar::instructions;
+use test::Bencher;
+
+fn make_instructions() -> Vec<Instruction> {
+    let meta = AccountMeta::new(Pubkey::new_rand(), false);
+    let inst = Instruction::new(Pubkey::new_rand(), &[0; 10], vec![meta; 4]);
+    vec![inst; 4]
+}
+
+#[bench]
+fn bench_bincode_instruction_serialize(b: &mut Bencher) {
+    let instructions = make_instructions();
+    b.iter(|| {
+        test::black_box(serialize(&instructions).unwrap());
+    });
+}
+
+#[bench]
+fn bench_manual_instruction_serialize(b: &mut Bencher) {
+    let instructions = make_instructions();
+    let message = Message::new(&instructions, None);
+    b.iter(|| {
+        test::black_box(message.serialize_instructions());
+    });
+}
+
+#[bench]
+fn bench_bincode_instruction_deserialize(b: &mut Bencher) {
+    let instructions = make_instructions();
+    let serialized = serialize(&instructions).unwrap();
+    b.iter(|| {
+        test::black_box(deserialize::<Vec<Instruction>>(&serialized).unwrap());
+    });
+}
+
+#[bench]
+fn bench_manual_instruction_deserialize(b: &mut Bencher) {
+    let instructions = make_instructions();
+    let message = Message::new(&instructions, None);
+    let serialized = message.serialize_instructions();
+    b.iter(|| {
+        for i in 0..instructions.len() {
+            test::black_box(instructions::get_instruction(i, &serialized).unwrap());
+        }
+    });
+}
+
+#[bench]
+fn bench_manual_instruction_deserialize_single(b: &mut Bencher) {
+    let instructions = make_instructions();
+    let message = Message::new(&instructions, None);
+    let serialized = message.serialize_instructions();
+    b.iter(|| {
+        test::black_box(instructions::get_instruction(3, &serialized).unwrap());
+    });
+}