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Lazy provider cache for enormous speed improvement

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a dinosaur
2025-07-10 04:37:35 +10:00
parent 7c98f3e5f0
commit 6ea612f9fc
1 changed files with 12 additions and 10 deletions
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22
Sources/apk/Index/ApkIndex.swift
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@ -8,6 +8,12 @@ import Foundation
public struct ApkIndex: Sendable {
public let packages: [ApkIndexPackage]
public typealias Index = Array<ApkIndexPackage>.Index
lazy var providers: [(ApkIndexProvides, Index)] = {
self.packages.enumerated().flatMap { index, pkg in
[ (.specific(name: pkg.name, version: pkg.version), index) ] + pkg.provides.map { ($0, index) }
}
}()
}
public extension ApkIndex {
@ -23,18 +29,14 @@ public extension ApkIndex {
}
}
func resolve(requirement: ApkVersionRequirement) -> ApkIndexPackage? {
self.packages.filter { pkg in
(pkg.name == requirement.name && requirement.versionSpec.satisfied(by: pkg.version))
|| pkg.provides.contains(where: { $0.satisfies(requirement) })
}.max()
mutating func resolve(requirement: ApkVersionRequirement) -> ApkIndexPackage? {
self.providers.filter { prv in prv.0.satisfies(requirement) }
.map { self.packages[$1] }.max()
}
func resolveIndex(requirement: ApkVersionRequirement) -> Index? {
self.packages.enumerated().lazy.filter { index, pkg in
return (pkg.name == requirement.name && requirement.versionSpec.satisfied(by: pkg.version))
|| pkg.provides.contains(where: { $0.satisfies(requirement) })
}.max { $0.element < $1.element }?.offset
mutating func resolveIndex(requirement: ApkVersionRequirement) -> Index? {
self.providers.filter { prv in prv.0.satisfies(requirement) }
.max { self.packages[$0.1] < self.packages[$1.1] }?.1
}
}