perf: use SmallVec in compute_function_id

Signed-off-by: ljedrz <[email protected]>

console/program/src/function_id/mod.rs

@@ -18,22 +18,25 @@ use snarkvm_console_algorithms::Result;
 use snarkvm_console_network::Network;
 use snarkvm_console_types::{Field, U16, U8};
 
+use smallvec::SmallVec;
+
 /// Compute the function ID as `Hash(network_id, program_id.len(), program_id, function_name.len(), function_name)`.
 pub fn compute_function_id<N: Network>(
     network_id: &U16<N>,
     program_id: &ProgramID<N>,
     function_name: &Identifier<N>,
 ) -> Result<Field<N>> {
-    N::hash_bhp1024(
-        &(
-            *network_id,
-            U8::<N>::new(program_id.name().size_in_bits()),
-            program_id.name(),
-            U8::<N>::new(program_id.network().size_in_bits()),
-            program_id.network(),
-            U8::<N>::new(function_name.size_in_bits()),
-            function_name,
-        )
-            .to_bits_le(),
+    let mut preimage: SmallVec<[bool; 256]> = SmallVec::new();
+    (
+        *network_id,
+        U8::<N>::new(program_id.name().size_in_bits()),
+        program_id.name(),
+        U8::<N>::new(program_id.network().size_in_bits()),
+        program_id.network(),
+        U8::<N>::new(function_name.size_in_bits()),
+        function_name,
     )
+        .write_bits_le(&mut preimage);
+
+    N::hash_bhp1024(&preimage)
 }