SDWebImage / SDWebImage/SDWebImageWebPCoder
Converting a UIImage to the WebP format is extremely slow
Nobody has claimed this yet.
- Dominant language
- Objective-C
- Stars
- 277
- Forks
- 101
- PR merge metrics
- No merged PRs in 30d
Description
Converting a UIImage to the WebP format is extremely slow. For a 2.5-megabyte photo with a compression ratio of 0.85, it takes approximately 13.5 seconds
let webpCoder = SDImageWebPCoder.shared
var options: [SDImageCoderOption: Any] = [:]
options[SDImageCoderOption.encodeCompressionQuality] = 0.85
if let webpData = webpCoder.encodedData(with: image, format: .webP, options: options) {
compressionImageData = webpData
}
Contributor guide
No contributing guide indexed for this repository
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start at the encodedData(with:format:options:) call shown in the issue and profile UIImage-to-WebP encoding with the stated 2.5 MB image and 0.85 quality. Compare the observed 13.5-second runtime with the libwebp-backed coder behavior. Done means identifying the encoding bottleneck and documenting or implementing a fix that materially improves this case.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- objective-c
- Domain
- mobile-dev, performance
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100