Hi… I see a similar lag when trying from a machine in ord, 
, so I don’t think it’s your ISP:
$ echo "$FLY_REGION"
ord
$ time curl -i 'https://court-dibs-59c4.fly.dev/' > /dev/null
real 0m2.485s
user 0m0.020s
sys 0m0.000s
$ time curl -i 'https://court-dibs-59c4.fly.dev/healthcheck' > /dev/null
real 0m2.607s
user 0m0.019s
sys 0m0.000s
In general, the health check should be a request directly from the Fly.io infrastructure to your 7815100b57e7e8 machine, so your local California network isn’t a likely suspect, anyway.
Are you using shared CPUs on Fly? Those can have very uneven response times.