Cloudflare Developers•7mo ago

Poor performance from Pages on static assets

Hello, I am using SvelteKit with the cloudflare-adapter to deploy to Pages. I'm seeing what looks like consistent poor performance from the /_app dir which is excluded in _routes.json:

{
        "version": 1,
        "description": "Generated by @sveltejs/adapter-cloudflare",
        "include": [
                "/*"
        ],
        "exclude": [
                "/_app/*",
                "/static/*"
        ]
}

{
        "version": 1,
        "description": "Generated by @sveltejs/adapter-cloudflare",
        "include": [
                "/*"
        ],
        "exclude": [
                "/_app/*",
                "/static/*"
        ]
}

I keep seeing over 600ms server response time for a 1.0 kB file, and in the worst case 2.76 seconds (see attached screenshot). Is this to be expected on the free plan in Asia/Tokyo?

1 Reply

Chaika•7mo ago

Pages uses KV which has two central stores, one in US and one in the EU, and then each Cloudflare location caches those assets once they are requested, so I would expect maybe some levels of elevated latency for locations far away from those, but that latency shouldn't persist if you refresh a few times, and probably shouldn't be that high. You can see which location you hit by appending /cdn-cgi/trace, ex: https://arcana-website.pages.dev/cdn-cgi/trace The colo= line is the airport code of the location you hit, if it's far away from where you are, could be poor routing

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Poor performance from Pages on static assets