Using a good editor helps in reducing time. IF youa coding or programming things for some custom programs like matlab is suggest you use the editor provided by them since it always have all features required. But for coding other programing languages like php,html,c ,c++ i suggest notepad++.
There are lots of attractive features that make notepad++ appealing.
I like the tabbed interface.
There are other plugins like function list and auto-completion which makes coding easy and faster.
To enable auto-completion you have to press ctrl+space.
Get Notepad++ here