I want to know which one Fully homomorphic encryption schemes are the best in terms of time to encrypt & decrypt or compare between them ?(Preferred valid link)
Encryption and decryption are usually the least problematic operations, in terms of performance, in FHE schemes.
The main software library I know for FHE is HElib, which is regularly maintained and been around for a while now. There are several different papers about various benchmarks of HElib. The most recent one I could find was HEtest: A Homomorphic Encryption Testing Framework. In Section 6.7 you find their encryption and decryption benchmarks. They state 33 ms for encryption and up to 5 seconds for decryption.
Very recently, there appeared a new library $\Lambda \circ \lambda$ (code can be found here). In Section E.2.2 they provide some performance results for a Somewhat Homomorphic Encryption (SHE) scheme, which allow you to evaluate circuits of a fixed depth. If I read the table (Figure 10) correct, then their encryption needs around 371 ms and their decryption 2.3 ms.