Llewellynvdm
commented
1 year ago Okay calculating the exact number of requests is difficult as it depends on various factors. However, we can use the estimate of 1 out of every 416 requests as a rough approximation based on Mozilla telemetry indicating that there is less than 0.24%.
Assuming an average of 1 billion HTTP requests per day, which is a conservative estimate, this would result in approximately 2.4 million HTTP/1.0 requests per day (1 billion divided by 416). Over a year, this would translate to roughly 876 million HTTP/1.0 requests per year.
Again, it's important to note that this is just an estimate and the actual number of HTTP/1.0 requests may be different. However, it gives a rough idea of the scale of the issue and underscores the need to carefully consider the impact of any changes to HTTP headers like 'Pragma' on the web ecosystem as a whole.
brianteeman
Summary of Changes
Pragma is a HTTP/1.0 header. In HTTP/1.1, Pragma is deprecated and superseded by the Cache-Control header. Remove Pragma to save bandwidth and processing power and it doesn't do anything as it is used after the cache-control header (this was by design to support http/1.0 headers a decade ago)
Mozilla telemetry indicates that there is less than 0.24% still using 1.0 https://mzl.la/3tFMtkA
httparchive didnt even include 1.0 in its 2020 almanac https://almanac.httparchive.org/en/2020/http#fig-3 but in 2019 they reported less than 0.06%
Pull Request for Issue #
Summary of Changes
Testing Instructions
Documentation Changes Required