Alright thanks for explaining that . Here's what I see explicitly setting the cookiejar
$ time curl -s -b cookies.txt -c cookies.txt -A "Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0" -e ";auto" -L https://t.co/DzIiCFp7Ti
[t.co meta refresh page src]
real 0m4.635s
user 0m0.004s
sys 0m0.008s
$ time curl -b cookies.txt -c cookies.txt -A "wget/1.23" -e ";auto" -L https://t.co/DzIiCFp7Ti curl: (7)
Failed to connect to www.threads.net port 443: Connection refused
real 0m4.635s
user 0m0.011s
sys 0m0.005s
$ time curl -b cookies.txt -c cookies.txt -e ";auto" -L https://t.co/DzIiCFp7Ti curl: (7)
Failed to connect to www.threads.net port 443 Connection refused
real 0m0.129s
user 0m0.000s
sys 0m0.013s
The failed to connects are threads.net likely blocking those user agents but the timing is there which is different than the first UA attempt.