From ffaa630f3467bebb0f0eda0f6f3fb99cc2010d95 Mon Sep 17 00:00:00 2001
From: Brent Simmons <brent@ranchero.com>
Date: Sat, 7 Dec 2019 14:23:51 -0800
Subject: [PATCH] Improve performance of finding updated articles by improving
 performance of comparing articles by improving performance of comparing
 authors.

---
 Frameworks/Articles/Author.swift | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Frameworks/Articles/Author.swift b/Frameworks/Articles/Author.swift
index 7debc8868..3bedce5bd 100644
--- a/Frameworks/Articles/Author.swift
+++ b/Frameworks/Articles/Author.swift
@@ -53,6 +53,20 @@ public struct Author: Codable, Hashable {
 		}
 		return nil
 	}
+
+	// MARK: - Hashable
+
+	public func hash(into hasher: inout Hasher) {
+		hasher.combine(authorID)
+	}
+
+	// MARK: - Equatable
+
+	static public func ==(lhs: Author, rhs: Author) -> Bool {
+		// The authorID is a calculation based on all the properties,
+		// and so it’s a quick shortcut to determine equality.
+		return lhs.authorID == rhs.authorID
+	}
 }
 
 extension Set where Element == Author {