Battle Lightest when comparing Avira vs Bitdefender vs Kaspersky?

[Willams]

Avira , Kaspersky or Bitdefender .In your opinion , what is the lightest?
Currently already I use Avira but I'm thinking of switching to Kaspersky .

 

[omidomi]

Avira is lightest based on my tests, using between 50-60MB at idle. Kaspersky is next, using 70-100 at idle. Bitdefender as usual uses almost 200MB at idle (as much as McAfee!). As far as subjective "lightness" tests, I sense the least slow down with Avira, followed by Bitdefender, with Kaspersky feeling the most sluggish (which is not bad compared to some others). Personally I won't use Bitdefender products (or Mcafee) simply because they use so much private memory at idle. I'd go with Avira Pro in your case.

In my systen Kaspersky use 55 Mb ram....

 

[Blackhawk]

Avira. Left is Private Bytes and on the right is Working Set in Sysinternals Process Explorer

 

[tonibalas]

In terms of lightness Avira i think is lighter followed by Kaspersky and last is BD.
A few months back i tried Avira Pro and it was light on my system.
On the other hand when i tried BD not only it was using about 270 MB of RAM but immediately i noticed that my browsing became slow.
About KIS which i use it right now the 2016 version is very light.No slowdown in browsing and it uses about 40-50 MB of RAM.
But KIS added a few seconds in boot time and shut down time but you hardly notice it.