Update from iai to iai-callgrind

This requires the iai-callgrind-runner binary to be installed (possible
via cargo install), but has the advantage of working with a recent
valgrind version (iai seems to be unmaintained for the past years).

Cargo.toml

@@ -89,7 +89,7 @@ serde_json = { version = "1", default-features = false, features = ["alloc"] }
 
 [dev-dependencies]
 criterion = "0.5.1"
-iai = "0.1.1"
+iai-callgrind = "0.14.0"
 once_cell = "1.20.2"
 pretty_assertions.workspace = true
 rasn-pkix = { path = "standards/pkix" }

benches/iai.rs

@@ -2,15 +2,20 @@ mod common;
 
 use common::*;
 
+use iai_callgrind::{library_benchmark, library_benchmark_group, main};
+use std::hint::black_box;
+
 macro_rules! encoding_rules {
     ($($encoding: ident ($encoding_fn:ident, $decoding_fn:ident)),+ $(,)?) => {
         $(
+            #[library_benchmark]
             fn $encoding_fn() {
-                let data = iai::black_box(bench_default());
+                let data = black_box(bench_default());
 
                 rasn::$encoding::encode(&data).unwrap();
             }
 
+            #[library_benchmark]
             fn $decoding_fn() {
                 use once_cell::sync::Lazy;
 
@@ -23,7 +28,9 @@ macro_rules! encoding_rules {
 
         )+
 
-        iai::main!{$($encoding_fn, $decoding_fn),+}
+        library_benchmark_group!(name = encode; benchmarks = $($encoding_fn),+);
+        library_benchmark_group!(name = decode; benchmarks = $($decoding_fn),+);
+        main!(library_benchmark_groups = encode, decode);
     }
 }