This question already has an answer here:

Merely adding two letters will take a few seconds for editors such as OVerleaf/Sharelatex to render a preview. How could this be the case? I just need a draft preview.

Are there any latex editors that run faster in previewing?

PS: high-end core i7

marked as duplicate by Henri Menke, Stefan Pinnow, Troy, Zarko, TeXnician Jul 2 '17 at 8:34

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • 1
    What matters is the total document length - not how different that length is to its previous length. It has to recompile the lot. Your processor is irrelevant if you're using OverLeaf/ShareLaTeX as your machine isn't doing the compiling. So you can just as soon use a Pentium 486 if you can persuade it to run a sufficiently modern browser to support the web interface. It won't affect compilation time. – cfr Jul 2 '17 at 3:11
  • 1
    If you compile locally, it will be faster. OverLeaf is very slow. (Don't know about ShareLaTeX.) It doesn't matter which editor you use. The editor has nothing to do with the compilation time, either. – cfr Jul 2 '17 at 3:13
  • 1
    Install a TeX distribution. – cfr Jul 2 '17 at 4:12
  • 4
    @BarisErkus »LuaLaTex runs faster than PdfLaTex« That is absolutely not true! – Henri Menke Jul 2 '17 at 7:52
  • 1
    @BarisErkus MikTeX isn't the only thing to use on Windows, i prefer TeX Live. Also, using LyX is different from using normal LaTeX. Using dvi or ps for previewing isn't really a modern approach as well. – Johannes_B Jul 2 '17 at 8:21