Improve moving average calculation speed

The code has maintained the most streamlined status.
Only one type of code.
value1 = AverageFC (x, y); plot1 (value1) ;
No other types of code.
In the case of multiple lines(20 or more)/large length input value(10000 or more) ,moving average calculation speed is slow(about 2~3 seconds).
This problem should be fixed.
Most other softwares available take immediate moment(about 0.1 seconds)to draw moving average lines.
Only MC need to "wait a while", this is a disturbance for short-swing daytraders.
( Because of intraday operations often switching chart resolutions, which leads to each switching chart resolutions must wait 2 to 3 seconds, it causes inconvenience.)
( A large number of windows or workspaces can be opened preparatively, but this way costs too much computer system resource.)