Update memory cache to perform some tasks such as trimming and removing experied objects with low priority (#234)

* Update memory cache to perform some tasks such as trimming and removing experied objects with low priority

* Update CHANGELOG

* Small change

Author: nguyenhuy

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 - [performance] Return TTL cache objects without waiting for all metadata to be read. [#228]
 (https://github.com/pinterest/PINCache/pull/228)
+- [performance] Memory cache now performs some tasks such as trimming and removing experied objects with low priority. [#234](https://github.com/pinterest/PINCache/pull/234)
 
 ## 3.0.1 -- Beta 7
 - [fix] Fix up warnings and upgrade to PINOperation 1.1.1: [#213](https://github.com/pinterest/PINCache/pull/213)

Source/PINMemoryCache.m

@@ -310,7 +310,7 @@ - (void)trimToAgeLimitRecursively
         if (shouldReschedule) {
             [self.operationQueue scheduleOperation:^{
                 [self trimToAgeLimitRecursively];
-            } withPriority:PINOperationQueuePriorityHigh];
+            } withPriority:PINOperationQueuePriorityLow];
         }
     });
 }
@@ -374,7 +374,7 @@ - (void)removeObjectForKeyAsync:(NSString *)key completion:(PINCacheObjectBlock)
 
         if (block)
             block(self, key, nil);
-    } withPriority:PINOperationQueuePriorityHigh];
+    } withPriority:PINOperationQueuePriorityLow];
 }
 
 - (void)trimToDateAsync:(NSDate *)trimDate completion:(PINCacheBlock)block
@@ -384,7 +384,7 @@ - (void)trimToDateAsync:(NSDate *)trimDate completion:(PINCacheBlock)block
 
         if (block)
             block(self);
-    } withPriority:PINOperationQueuePriorityHigh];
+    } withPriority:PINOperationQueuePriorityLow];
 }
 
 - (void)trimToCostAsync:(NSUInteger)cost completion:(PINCacheBlock)block
@@ -394,7 +394,7 @@ - (void)trimToCostAsync:(NSUInteger)cost completion:(PINCacheBlock)block
 
         if (block)
             block(self);
-    } withPriority:PINOperationQueuePriorityHigh];
+    } withPriority:PINOperationQueuePriorityLow];
 }
 
 - (void)trimToCostByDateAsync:(NSUInteger)cost completion:(PINCacheBlock)block
@@ -404,7 +404,7 @@ - (void)trimToCostByDateAsync:(NSUInteger)cost completion:(PINCacheBlock)block
 
         if (block)
             block(self);
-    } withPriority:PINOperationQueuePriorityHigh];
+    } withPriority:PINOperationQueuePriorityLow];
 }
 
 - (void)removeExpiredObjectsAsync:(PINCacheBlock)block
@@ -414,7 +414,7 @@ - (void)removeExpiredObjectsAsync:(PINCacheBlock)block
 
         if (block)
             block(self);
-    } withPriority:PINOperationQueuePriorityHigh];
+    } withPriority:PINOperationQueuePriorityLow];
 }
 
 - (void)removeAllObjectsAsync:(PINCacheBlock)block
@@ -424,7 +424,7 @@ - (void)removeAllObjectsAsync:(PINCacheBlock)block
 
         if (block)
             block(self);
-    } withPriority:PINOperationQueuePriorityHigh];
+    } withPriority:PINOperationQueuePriorityLow];
 }
 
 - (void)enumerateObjectsWithBlockAsync:(PINCacheObjectEnumerationBlock)block completionBlock:(PINCacheBlock)completionBlock
@@ -434,7 +434,7 @@ - (void)enumerateObjectsWithBlockAsync:(PINCacheObjectEnumerationBlock)block com
 
         if (completionBlock)
             completionBlock(self);
-    } withPriority:PINOperationQueuePriorityHigh];
+    } withPriority:PINOperationQueuePriorityLow];
 }
 
 #pragma mark - Public Synchronous Methods -