Slow TTFB with CF

I’m running my site hosted by GitHub Pages.

Without CF

curl -v -ko /dev/null -H 'Cache-Control: no-cache' -s -w "Connect: %{time_connect} TTFB: %{time_starttransfer} Total time: %{time_total} \n" "" --resolve ''
< x-served-by: cache-sin18044-SIN
Connect: 0.004530 TTFB: 0.038793 Total time: 0.045935

With CF

curl -v -ko /dev/null -H 'Cache-Control: no-cache' -s -w "Connect: %{time_connect} TTFB: %{time_starttransfer} Total time: %{time_total} \n" ""
< cf-ray: 58aa7e418ae30449-MIA
< cf-request-id: 025e6d3cf000000449db28e200000001
< x-served-by: cache-mia17621-MIA
Connect: 0.237563 TTFB: 0.810612 Total time: 1.042128

Tested in Singapore. For the life of me, I can’t figure out why the difference is so huge. I also enabled static HTML caching via Page Rule.

The cf-ray shows MIA. Shouldn’t it be SIN? I did some tests with WebPageTest in different locations. They showed the correct datacenter location except Singapore.

Singapore seems to be rather slow lately.

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