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Faster collection operations (#748)

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* Faster collection operations

* Fix a few things

* Put the stupid semicolon

* Address warning

* Cut down retain/releases during collection operations

* Update CHANGELOG.md
This commit is contained in:
Adlai Holler
2018-01-22 05:22:03 -08:00
committed by Huy Nguyen
parent b5d3e52e8b
commit 5c13403ef7
14 changed files with 100 additions and 108 deletions
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83
Source/Base/ASBaseDefines.h
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@@ -132,22 +132,6 @@
#define __has_attribute(x) 0 // Compatibility with non-clang compilers.
#endif
#ifndef NS_CONSUMED
#if __has_feature(attribute_ns_consumed)
#define NS_CONSUMED __attribute__((ns_consumed))
#else
#define NS_CONSUMED
#endif
#endif
#ifndef NS_RETURNS_RETAINED
#if __has_feature(attribute_ns_returns_retained)
#define NS_RETURNS_RETAINED __attribute__((ns_returns_retained))
#else
#define NS_RETURNS_RETAINED
#endif
#endif
#ifndef CF_RETURNS_RETAINED
#if __has_feature(attribute_cf_returns_retained)
#define CF_RETURNS_RETAINED __attribute__((cf_returns_retained))
@@ -245,26 +229,38 @@
* Create a new set by mapping `collection` over `work`, ignoring nil.
*/
#define ASSetByFlatMapping(collection, decl, work) ({ \
NSMutableSet *s = [NSMutableSet set]; \
CFTypeRef _cArray[collection.count]; \
NSUInteger _i = 0; \
for (decl in collection) {\
id result = work; \
if (result != nil) { \
[s addObject:result]; \
if ((_cArray[_i] = (__bridge_retained CFTypeRef)work)) { \
_i++; \
} \
} \
s; \
NSSet *result; \
if (_i == 0) { \
/** Zero fast path. */ \
result = [NSSet set]; \
} else if (_i == 1) { \
/** NSSingleObjectSet is fast. Create one and release. */ \
CFTypeRef val = _cArray[0]; \
result = [NSSet setWithObject:(__bridge id)val]; \
CFBridgingRelease(val); \
} else { \
CFSetCallBacks cb = kCFTypeSetCallBacks; \
cb.retain = NULL; \
result = (__bridge NSSet *)CFSetCreate(kCFAllocatorDefault, _cArray, _i, &cb); \
} \
result; \
})
/**
* Create a new ObjectPointerPersonality NSHashTable by mapping `collection` over `work`, ignoring nil.
*/
#define ASPointerTableByFlatMapping(collection, decl, work) ({ \
NSHashTable *t = [NSHashTable hashTableWithOptions:NSHashTableObjectPointerPersonality]; \
NSHashTable *t = [[NSHashTable alloc] initWithOptions:NSHashTableObjectPointerPersonality capacity:collection.count]; \
for (decl in collection) {\
id result = work; \
if (result != nil) { \
[t addObject:result]; \
} \
/* NSHashTable accepts nil and avoid extra retain/release. */ \
[t addObject:work]; \
} \
t; \
})
@@ -273,12 +269,37 @@
* Create a new array by mapping `collection` over `work`, ignoring nil.
*/
#define ASArrayByFlatMapping(collection, decl, work) ({ \
NSMutableArray *a = [NSMutableArray array]; \
CFTypeRef _cArray[collection.count]; \
NSUInteger _i = 0; \
for (decl in collection) {\
id result = work; \
if (result != nil) { \
[a addObject:result]; \
if ((_cArray[_i] = (__bridge_retained CFTypeRef)work)) { \
_i++; \
} \
} \
a; \
NSArray *result; \
if (_i == 0) { \
/** Zero array fast path. */ \
result = @[]; \
} else if (_i == 1) { \
/** NSSingleObjectArray is fast. Create one and release. */ \
CFTypeRef val = _cArray[0]; \
result = [NSArray arrayWithObject:(__bridge id)val]; \
CFBridgingRelease(val); \
} else { \
CFArrayCallBacks cb = kCFTypeArrayCallBacks; \
cb.retain = NULL; \
result = (__bridge NSArray *)CFArrayCreate(kCFAllocatorDefault, _cArray, _i, &cb); \
} \
result; \
})
#define ASMutableArrayByFlatMapping(collection, decl, work) ({ \
id _cArray[collection.count]; \
NSUInteger _i = 0; \
for (decl in collection) {\
if ((_cArray[_i] = work)) { \
_i++; \
} \
} \
[[NSMutableArray alloc] initWithObjects:_cArray count:_i]; \
})