How to set crawl time for each URL in a list of URLS

[ayusheek]

i have a file named sites.txt like this

https://google.com
https://example.com

Using katana i want to scan them however using the default -l flag won't work for me as i need to set crawl duration for each URL using -ct flag . I tried the following:

cat sites.txt | while read URL; do katana -u $URL -ct 10s; done

Ouput

$ cat foobar | while read URL; do katana -u $URL -ct 10s; done

   __        __                
  / /_____ _/ /____ ____  ___ _
 /  '_/ _  / __/ _  / _ \/ _  /
/_/\_\\_,_/\__/\_,_/_//_/\_,_/							 

		projectdiscovery.io

[INF] Current katana version v1.1.0 (latest)
[INF] Started standard crawling for => https://example.com
[INF] Started standard crawling for => https://google.com

As you can see from above ouput, katana starts to crawl both the sites immediately instead of waiting for first to finish or setting any rules this can cause many issues such as:

1. If there are multiple sites in the file say 1000. my system will crash immediatly since katana starts crawling all of them without any rules.
2. I checked whether my above approach give me desired result i.e. "crawl maximum for 10s for each site" but it didn't work. see output below

$ time cat sites.txt | while read URL; do katana -u $URL -ct 10s; done

   __        __                
  / /_____ _/ /____ ____  ___ _
 /  '_/ _  / __/ _  / _ \/ _  /
/_/\_\\_,_/\__/\_,_/_//_/\_,_/							 

		projectdiscovery.io

[INF] Started standard crawling for => https://google.com
[INF] Started standard crawling for => https://example.com
https://google.com
https://example.com

real	0m15.171s
user	0m0.089s
sys	0m0.027s

As you can see it took only approx 15s to execute the command but it must be > 20s. since i set 10s + 10s for both sites. so this approach didn't work.

I would be grateful if anyone could bless me with a fix for this. Thanks and Sorry i am a complete newbie in GoLang so i am unable to find a solution for it by myself.