tooooooslow-process_manager.vim

function! s:sync(pm)
    let [out, err, stat]= a:pm.read('ji', [' > '])

    while stat !=# 'matched'
        let [out, err, stat]= a:pm.read('ji', [' > '])
    endwhile

    return out
endfunction

let pm= vital#of('vital').import('ProcessManager')

if 'new' ==# pm.touch('ji', 'java -jar ' . expand('~/Documents/sources/java/java-javaimport/target/unite-javaimport-0.02-jar-with-dependencies.jar'))
    call s:sync(pm)
endif

call pm.writeln('ji', 'path add ' . expand('~/Documents/apps/java7/jdk7u55.x64/jre/lib/rt.jar'))
echo s:sync(pm)

call pm.writeln('ji', 'list --public')
echo s:sync(pm)

let start_time= reltime()
call pm.writeln('ji', 'list --public')
echo s:sync(pm)
echo reltimestr(reltime(start_time))

call pm.writeln('ji', 'quit')

call pm.term('ji')

tooooooslow-vimproc.vim

function! s:sync(pm)
    let out= a:pm.stdout.read()

    while out !~# "\\(^\\|\n\\)" . ' > '
        let out.= a:pm.stdout.read()
    endwhile

    return substitute(out, "\\(^\\|\n\\)" . ' > ', '', '')
endfunction

let pipe= vimproc#popen3('java -jar ' . expand('~/Documents/sources/java/java-javaimport/target/unite-javaimport-0.02-jar-with-dependencies.jar'))

echo s:sync(pipe)

call pipe.stdin.write('path add ' . expand('~/Documents/apps/java7/jdk7u55.x64/jre/lib/rt.jar') . "\n")
echo s:sync(pipe)

call pipe.stdin.write('list --public' . "\n")
echo s:sync(pipe)

let start_time= reltime()
call pipe.stdin.write('list --public' . "\n")
echo s:sync(pipe)
echo reltimestr(reltime(start_time))

call pipe.stdin.write('quit' . "\n")

call pipe.waitpid()