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Use a serial queue for RSImage.scaledForIcon, so we don’t end up having a ton of threads and doing too much at once, which hurts performance. Fix #1489.

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This commit is contained in:
Brent Simmons 2020-03-19 22:22:58 -07:00
parent 4d18c34759
commit 910e14b441
1 changed files with 26 additions and 7 deletions
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33
Shared/Extensions/RSImage-Extensions.swift
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@ -6,6 +6,7 @@
// Copyright © 2019 Ranchero Software. All rights reserved.
//
import RSCore
#if os(macOS)
import AppKit
#else
@ -18,13 +19,8 @@ extension RSImage {
static let maxIconSize = 48
static func scaledForIcon(_ data: Data, imageResultBlock: @escaping (RSImage?) -> Void) {
DispatchQueue.global(qos: .default).async {
let image = RSImage.scaledForIcon(data)
DispatchQueue.main.async {
imageResultBlock(image)
}
}
static func scaledForIcon(_ data: Data, imageResultBlock: @escaping ImageResultBlock) {
IconScalerQueue.shared.scaledForIcon(data, imageResultBlock)
}
static func scaledForIcon(_ data: Data) -> RSImage? {
@ -41,3 +37,26 @@ extension RSImage {
#endif
}
}
// MARK: - IconScalerQueue
private class IconScalerQueue {
static let shared = IconScalerQueue()
private let queue: DispatchQueue = {
let q = DispatchQueue(label: "IconScaler", attributes: .initiallyInactive)
q.setTarget(queue: DispatchQueue.global(qos: .default))
q.activate()
return q
}()
func scaledForIcon(_ data: Data, _ imageResultBlock: @escaping ImageResultBlock) {
queue.async {
let image = RSImage.scaledForIcon(data)
DispatchQueue.main.async {
imageResultBlock(image)
}
}
}
}