I’m usng WordPress , and I’ve installed these plugins – Askmet, InfusionLite, Jetpack, SEO ultmate, shareaholic, WP usercontrol, Social Stickers
Can these plugins slowdown my website considerably ?
of course, too much plugins will slow down your website download speed.
So you need to make sure all the plugins you install are necessary for you.
As a wordpress user, I recommend you to read this article to learn which plugins are necessary for you.
Of course it will. So you'd better opt for the necessary ones to install.
JETPack and SEO Ultimate are particularly troublesome. Otherwise, use p3 plugin profile as the other user mentioned to find the problem. But yes, where possible, always hard code your functionality, keeping to <10 plugins.
How To Uncover Which WordPress Plugins are Slowing You Down
Plugins can impact your wordpress site performance by:
-Additional DB Queries: well coded plugins will not cause a significant issue
the solution can be by enabling caching and upgrade your hosting?
I don't know how much those particular plug ins slow down your website but, in general, the more plug ins you have, the slower your website will be. Some plug ins have a bigger effect than others.