In your render queue click Best Settings to the right of Render Settings: and set the resolution to Half in the Render Settings window. This will make it so that a 1920x1080 comp will be rendered at a resolution of 960x540 and based on my tests, the renders tend to be about 1/3 faster:
The good thing about doing it this way is if you render to a production codec, and you like the test render you don't even have to bother re-rendering because you can just stick the clip back into After Effects and scale it to fit a comp using the NTSC DV Widescreen 23.976 Preset and render it out again:
Or if you're just going to put your video on YouTube or Vimeo I would use the Adobe Media Encoder YouTube preset and edit it to match your needs. Check here to find out how:
Also, if you have access to a Mac for rendering you should check out AERenderQ, which is a super useful droplet application that allows you to render your After Effects comps in the background using the Terminal, which can greatly speed things up.
Many thanks Ben , you are always great help.
I am gonna try this now and see how it goes and will let you know how it went .
Thanks for xtra effort.
One again Ben many thanks, it worked very fine and the rendering time was only 3 to 4 hrs and the quality was just the same. You are great.