use swift-extras-base64 when possible

Cargo.toml

@@ -21,4 +21,7 @@ toml = "0.8.8"
 serde = { version = "1.0.195", features = ["derive"] }
 
 [[bin]]
-name = "swift-precompiler"
+name = "swift-precompiler"
+
+[profile.release]
+lto = true

README.md

@@ -48,3 +48,5 @@ swift-precompiler precompile
 ```
 
 <sub>You should add `Precompiled.swift` to your `.gitignore`</sub>
+
+Swift Precompiler encodes your strings with Base64, you can add [swift-extras-base64](https://github.com/swift-extras/swift-extras-base64) to your project using SPM to enable faster Base64 decode.

assets/PrecompiledTemplate.swift

@@ -1,4 +1,7 @@
 import Foundation
+#if canImport(ExtrasBase64)
+import ExtrasBase64
+#endif
 
 extension Data {
     /// Same as ``Data(base64Encoded:)``, but adds padding automatically
@@ -35,7 +38,11 @@ func precompileIncludeStr(_ path: String) -> String {
             fatalError("Error: include file not found: \(path)")
     }
 
+    #if canImport(ExtrasBase64)
+    return String(bytes: try! Base64.decode(string: content), encoding: .utf8)
+    #else
     return String.fromBase64(content) ?? ""
+    #endif
 }
 
 func precompileIncludeData(_ path: String) -> Data {