Add CPU and memory to Faq

docs/site/content/en/docs/help/faq.md

@@ -4,24 +4,24 @@ description: "Answers to frequently asked questions."
 lead: "Answers to frequently asked questions."
 date: 2020-10-06T08:49:31+00:00
 lastmod: 2020-10-06T08:49:31+00:00
-draft: true
+draft: false
 images: []
 menu:
-  docs:
-    parent: "help"
+docs:
+parent: "help"
 weight: 630
 toc: true
 ---
 
+## How much CPU and Memory does WhatsApp HTTP API consume?
+The benchmark has been made on **Intel(R) Core(TM) i7-10510U CPU @ 1.80GHz**.
+It may differ from case to case, it depends on usage pattern - how many messages you get, how many send, etc.
 
-## How to build the newest Docker image locally
-
-If the changes haven't been released yet from `main` branch - you can build your own version from the git repository
-
-```bash
-git clone https://github.com/devlikeapro/whatsapp-http-api.git
-cd whatsapp-http-api
-docker build . -t devlikeapro/whatsapp-http-api
-```
+| Accounts (sessions) in the container | CPU  | Memory |
+|--------------------------------------|------|--------|
+| 1                                    | 30%  | 400MB  |
+| 10                                   | 270% | 1.5GB  |
 
 
+The nature of WhatsApp HTTP API and its underlying engines - is to run **real** WhatsApp Web version in Chrome and
+communicate with it to prevent blocking from WhatsApp. It's the reason why it's so demanding on resources.