Is there a command to load all swap into the memory?

[Yuri]

I am asking out of curiosity.
'top' describes the memory state on my machine like this:
Mem: 1085M Active, 196M Inact, 301M Wired, 36M Cache, 112M Buf, 1366M Free
Swap: 16G Total, 757M Used, 16G Free, 4% Inuse

There is enough space in memory to load back all swap. Is there a 
command to do that for all swap?
This will speed up immediate system response in the future.

Yuri