🚀 A series of performance improvement plans

[Yrp]

Project	Issue	Description	Progess(%)
Account Asset Optimization	#3648		60
High-frequency data caching	#3585
Parallelization of validate and execute
R/W Separation and R/W Parallelism		For database
Parallelization of pushTransaction and pushBlock
Support JDK 11	#3542	ZGC
Optimization of process execution sequence		such as block execution and broadcast sequences

[Yrp]

👏 Suggestions for improvement are welcome!

[andelf]

JDK 11 support is almost impossible. Java-tron should stay at JDK8.

See-also: andelf/opentron#36

[Benson0224]

Close this issue as no feedback for a long time, feel free to reopen it if you still see the issue. thanks.