Optimize DAG-CBOR encode/decode and CAR block parsing (#104)

Author: MarshalX

Cargo.toml

@@ -19,6 +19,9 @@ anyhow = "1.0.102"
 cid = "0.11.3"
 cbor4ii = { version = "1.2.2" }
 
+[build-dependencies]
+pyo3-build-config = "0.28.3"
+
 [workspace]
 members = [ "profiling" ]
 

build.rs

@@ -0,0 +1,9 @@
+fn main() {
+    if matches!(
+        pyo3_build_config::get().implementation,
+        pyo3_build_config::PythonImplementation::CPython
+    ) {
+        println!("cargo:rustc-cfg=CPython");
+    }
+    println!("cargo:rustc-check-cfg=cfg(CPython)");
+}