tyiu/damus
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

perf: move blurhash processing to a background task

Browse Source 
Using Task directly will only inherent the parent thread. We need
detached to do heaving processing.
This commit is contained in:
William Casarin
2023-06-20 16:28:22 +02:00
parent e4842cca3c
commit 0bea81c632
1 changed files with 2 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
damus/Util/Images/ImageMetadata.swift
View File

@@ -59,17 +59,15 @@ struct ImageMetadata: Equatable {
} }
func process_blurhash(blurhash: String, size: CGSize?) async -> UIImage? { func process_blurhash(blurhash: String, size: CGSize?) async -> UIImage? {
let res = Task.init { let res = Task.detached(priority: .low) {
let size = get_blurhash_size(img_size: size ?? CGSize(width: 100.0, height: 100.0)) let size = get_blurhash_size(img_size: size ?? CGSize(width: 100.0, height: 100.0))
guard let img = UIImage.init(blurHash: blurhash, size: size) else { guard let img = UIImage.init(blurHash: blurhash, size: size) else {
let noimg: UIImage? = nil let noimg: UIImage? = nil
return noimg return noimg
} }
return img return img
} }
return await res.value return await res.value
} }
@@ -146,7 +144,7 @@ func calculate_blurhash(img: UIImage) async -> String? {
return nil return nil
} }
let res = Task.init { let res = Task.detached(priority: .low) {
let bhs = get_blurhash_size(img_size: img.size) let bhs = get_blurhash_size(img_size: img.size)
let smaller = img.resized(to: bhs) let smaller = img.resized(to: bhs)