Add Access-Control-Max-Age header to CORS responses
#18975
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anoadragon453
requested changes
Sep 29, 2025
Co-authored-by: Andrew Morgan <[email protected]>
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This PR adds the
Access-Control-Max-Ageheader to CORS responses to allow browsers to cache the results of preflight requests for 10 minutes.By doing so, clients, especially during startup, will avoid sending repeated OPTIONS requests for each endpoint. This can noticeably improve performance and shave off more than a full second in many cases during startup: