Unity Benchmark comparing "Resources" vs Addressable load time
ShaderLab
Unity Load Asset API Benchmark
Comparing Resources.Load vs Addressables.LoadAsset. It's difficult to test using Addressables.LoadAssetAsync because it is ran on seperated thread. Don't take the results into account immediately, because this is premature optimization stuff. Especially the benchmark test is about 100,000 iterations and find the best API based on your game architecture instead!