Switch to blob().text() for faster fetch parsing#76
Open
dmeremyanin wants to merge 1 commit intocloudflare:mainfrom
Open
Switch to blob().text() for faster fetch parsing#76dmeremyanin wants to merge 1 commit intocloudflare:mainfrom
dmeremyanin wants to merge 1 commit intocloudflare:mainfrom
Conversation
Contributor
|
Please set a semver versioning label of either |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
I noticed that download speeds were significantly slower than expected (and much slower than upload speeds) when testing against a local Go-based backend.
It turns out
response.text()creates significant backpressure. Because JS handles the text chunks slower than the network can deliver them, it throttles the actual TCP connection. Usingresponse.blob().text()avoids JS backpressure and results in a more accurate network speed measurement.In local tests, the difference is substantial – around a 9-10x improvement. Below is a simple benchmark run in Chrome on a MacBook M4 Pro downloading a 100MB payload:
