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@Gankra Gankra commented Nov 10, 2016

Now that the rewrite of HashedCollections is done, we can move forward with looking at the impact of eager bridging Dictionary and Set. Not implemented in this PR is the refactoring of the design of bridging that @dabrahams did. That was just to get this out tonight to run benching/testing and get some feedback.

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Gankra commented Nov 10, 2016

@swift-ci Please smoke test

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Gankra commented Nov 10, 2016

@swift-ci Please benchmark

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Build comment file:

Optimized (O)

Regression (12)

TEST OLD_MIN NEW_MIN DELTA (%) SPEEDUP
ObjectiveCBridgeFromNSDictionaryAnyObjectForced 5126 81178 +1483.7% 0.06x
ObjectiveCBridgeFromNSSetAnyObjectForced 4462 69691 +1461.9% 0.06x
ObjectiveCBridgeFromNSSetAnyObject 79821 113898 +42.7% 0.70x
ObjectiveCBridgeFromNSSetAnyObjectToString 129359 170382 +31.7% 0.76x
ObjectiveCBridgeFromNSDictionaryAnyObject 167848 198741 +18.4% 0.84x
146 2821761 3143141 +11.4% 0.90x
ObjectiveCBridgeFromNSDictionaryAnyObjectToString 193716 210749 +8.8% 0.92x(?)
MapReduce 322 351 +9.0% 0.92x
NSStringConversion 750 807 +7.6% 0.93x
ObjectiveCBridgeStubFromNSDateRef 3448 3674 +6.5% 0.94x
Calculator 32 34 +6.2% 0.94x
ObjectiveCBridgeStubFromNSDate 3370 3583 +6.3% 0.94x

Improvement (18)

TEST OLD_MIN NEW_MIN DELTA (%) SPEEDUP
SetExclusiveOr_OfObjects 7003 6470 -7.6% 1.08x(?)
RGBHistogram 2141 1974 -7.8% 1.08x
TwoSum 1254 1166 -7.0% 1.08x
Dictionary3 492 453 -7.9% 1.09x(?)
SetIntersect_OfObjects 1370 1242 -9.3% 1.10x
ObjectiveCBridgeStubNSDateRefAccess 320 291 -9.1% 1.10x
SetUnion_OfObjects 5868 5354 -8.8% 1.10x
CaptureProp 4315 3890 -9.8% 1.11x
Dictionary2OfObjects 3262 2901 -11.1% 1.12x
DictionaryOfObjects 2162 1912 -11.6% 1.13x(?)
PopFrontArrayGeneric 1189 1053 -11.4% 1.13x(?)
SetIsSubsetOf_OfObjects 289 246 -14.9% 1.17x
ObjectiveCBridgeStubFromNSStringRef 149 123 -17.4% 1.21x
DictionaryRemoveOfObjects 18227 13749 -24.6% 1.33x
SetExclusiveOr 2860 1973 -31.0% 1.45x
SetUnion 2298 1506 -34.5% 1.53x
DictionarySwapOfObjects 5909 3361 -43.1% 1.76x
SetIsSubsetOf 236 44 -81.4% 5.36x

No Changes (117)

TEST OLD_MIN NEW_MIN DELTA (%) SPEEDUP
Dictionary3OfObjects 822 782 -4.9% 1.05x
PopFrontArray 1069 1028 -3.8% 1.04x(?)
Dictionary2 1912 1844 -3.6% 1.04x
Dictionary 676 647 -4.3% 1.04x
RGBHistogramOfObjects 20407 19693 -3.5% 1.04x
Histogram 272 265 -2.6% 1.03x(?)
Prims 688 665 -3.3% 1.03x
DictionarySwap 393 381 -3.0% 1.03x
Hanoi 3256 3146 -3.4% 1.03x
StringInterpolation 10361 10200 -1.6% 1.02x(?)
Join 442 435 -1.6% 1.02x(?)
ObjectiveCBridgeStubURLAppendPath 224522 220386 -1.8% 1.02x(?)
ObjectiveCBridgeStubToArrayOfNSString 28167 27635 -1.9% 1.02x(?)
SetIntersect 335 327 -2.4% 1.02x
ObjectiveCBridgeStubDataAppend 2862 2806 -2.0% 1.02x(?)
MonteCarloE 9963 9815 -1.5% 1.02x
StringHasPrefixUnicode 13331 13059 -2.0% 1.02x
SortLettersInPlace 918 912 -0.7% 1.01x(?)
ObjectiveCBridgeFromNSString 1719 1700 -1.1% 1.01x(?)
ObserverClosure 1858 1844 -0.8% 1.01x(?)
StaticArray 2612 2589 -0.9% 1.01x(?)
HashTest 1655 1634 -1.3% 1.01x(?)
ErrorHandling 2771 2739 -1.1% 1.01x(?)
ObserverUnappliedMethod 2241 2217 -1.1% 1.01x(?)
ObjectiveCBridgeToNSArray 28769 28542 -0.8% 1.01x(?)
StringEqualPointerComparison 6928 6892 -0.5% 1.01x
ObjectiveCBridgeStubToNSStringRef 110 109 -0.9% 1.01x(?)
SortStringsUnicode 7756 7715 -0.5% 1.01x(?)
NSDictionaryCastToSwift 4686 4658 -0.6% 1.01x(?)
DeadArray 174 172 -1.1% 1.01x
ObjectiveCBridgeStubNSDataAppend 2315 2293 -0.9% 1.01x(?)
ObjectiveCBridgeFromNSArrayAnyObjectToStringForced 85912 84989 -1.1% 1.01x(?)
ObjectiveCBridgeStubFromArrayOfNSString 55526 54917 -1.1% 1.01x(?)
ObjectiveCBridgeToNSString 1009 1012 +0.3% 1.00x(?)
MonteCarloPi 42424 42454 +0.1% 1.00x(?)
StackPromo 20324 20414 +0.4% 1.00x(?)
RecursiveOwnedParameter 1829 1829 +0.0% 1.00x
Integrate 225 225 +0.0% 1.00x
ClassArrayGetter 12 12 +0.0% 1.00x
Array2D 1936 1943 +0.4% 1.00x(?)
SortStrings 1711 1719 +0.5% 1.00x(?)
ArrayOfGenericPOD 207 207 +0.0% 1.00x
StringWithCString 146339 146482 +0.1% 1.00x(?)
ObjectiveCBridgeFromNSStringForced 2514 2523 +0.4% 1.00x(?)
RangeAssignment 273 272 -0.4% 1.00x(?)
StrComplexWalk 2719 2728 +0.3% 1.00x(?)
ByteSwap 0 0 +0.0% 1.00x
ArrayAppendGenericStructs 1142 1143 +0.1% 1.00x(?)
SuperChars 200041 200806 +0.4% 1.00x(?)
ArrayAppendLazyMap 801 800 -0.1% 1.00x(?)
XorLoop 359 359 +0.0% 1.00x
AnyHashableWithAClass 60037 59757 -0.5% 1.00x(?)
ObjectiveCBridgeStubToNSString 1202 1206 +0.3% 1.00x(?)
ArrayAppendStrings 11365 11376 +0.1% 1.00x(?)
ProtocolDispatch 2868 2867 -0.0% 1.00x(?)
ObjectAllocation 145 145 +0.0% 1.00x
TypeFlood 0 0 +0.0% 1.00x
StringHasSuffixUnicode 59840 59719 -0.2% 1.00x(?)
ArrayLiteral 1116 1111 -0.5% 1.00x(?)
ArrayOfRef 3352 3344 -0.2% 1.00x(?)
ArrayAppendOptionals 1141 1144 +0.3% 1.00x(?)
NSError 307 307 +0.0% 1.00x
PopFrontUnsafePointer 8672 8635 -0.4% 1.00x(?)
PolymorphicCalls 20 20 +0.0% 1.00x
ArrayAppendReserved 506 506 +0.0% 1.00x
ObjectiveCBridgeStubDateMutation 258 258 +0.0% 1.00x
DictionaryLiteral 1196 1200 +0.3% 1.00x(?)
OpenClose 51 51 +0.0% 1.00x
UTF8Decode 272 272 +0.0% 1.00x
NopDeinit 35967 35940 -0.1% 1.00x(?)
ObjectiveCBridgeFromNSArrayAnyObject 71399 71215 -0.3% 1.00x(?)
StringBuilder 1244 1241 -0.2% 1.00x(?)
ArrayOfGenericRef 3407 3402 -0.1% 1.00x(?)
StringHasSuffix 755 755 +0.0% 1.00x
Phonebook 7091 7084 -0.1% 1.00x(?)
ObjectiveCBridgeStubDateAccess 172 172 +0.0% 1.00x
Sim2DArray 261 261 +0.0% 1.00x
ArrayAppendRepeatCol 607 607 +0.0% 1.00x
ObjectiveCBridgeToNSDictionary 59584 59544 -0.1% 1.00x(?)
GlobalClass 0 0 +0.0% 1.00x
ArrayAppend 731 731 +0.0% 1.00x
LinkedList 6820 6801 -0.3% 1.00x(?)
ArrayAppendSequence 1003 1003 +0.0% 1.00x
ArrayAppendArrayOfInt 566 566 +0.0% 1.00x
ArrayOfPOD 172 172 +0.0% 1.00x
ObserverForwarderStruct 842 844 +0.2% 1.00x(?)
BitCount 1 1 +0.0% 1.00x
AngryPhonebook 2666 2665 -0.0% 1.00x(?)
ArrayValueProp3 5 5 +0.0% 1.00x
StringWalk 5581 5579 -0.0% 1.00x(?)
ArrayValueProp 5 5 +0.0% 1.00x
RC4 156 156 +0.0% 1.00x
Memset 222 222 +0.0% 1.00x
ArrayValueProp4 5 5 +0.0% 1.00x
ArrayValueProp2 5 5 +0.0% 1.00x
SevenBoom 1284 1281 -0.2% 1.00x(?)
ObserverPartiallyAppliedMethod 3185 3199 +0.4% 1.00x(?)
ArraySubscript 1353 1361 +0.6% 0.99x(?)
ObjectiveCBridgeFromNSArrayAnyObjectToString 110969 112345 +1.2% 0.99x(?)
ObjectiveCBridgeFromNSArrayAnyObjectForced 5930 5974 +0.7% 0.99x(?)
ObjectiveCBridgeStubToNSDate 12513 12690 +1.4% 0.99x(?)
ProtocolDispatch2 149 150 +0.7% 0.99x(?)
StringHasPrefix 678 687 +1.3% 0.99x(?)
ObjectiveCBridgeStubURLAppendPathRef 220085 222719 +1.2% 0.99x(?)
ObjectiveCBridgeToNSSet 38067 38571 +1.3% 0.99x(?)
DictionaryRemove 2195 2217 +1.0% 0.99x(?)
ObjectiveCBridgeFromNSSetAnyObjectToStringForced 96080 96702 +0.7% 0.99x(?)
DictionaryBridge 3561 3649 +2.5% 0.98x(?)
ObjectiveCBridgeStubToNSDateRef 3035 3100 +2.1% 0.98x(?)
IterateData 2402 2457 +2.3% 0.98x
ObjectiveCBridgeFromNSDictionaryAnyObjectToStringForced 121081 123762 +2.2% 0.98x(?)
ArrayInClass 59 60 +1.7% 0.98x(?)
Chars 583 596 +2.2% 0.98x
ObjectiveCBridgeStubFromNSString 721 743 +3.0% 0.97x
Walsh 292 302 +3.4% 0.97x
ObjectiveCBridgeStubNSDateMutationRef 11021 11322 +2.7% 0.97x(?)
StrToInt 4828 5100 +5.6% 0.95x
**Unoptimized (Onone)**

Regression (9)

TEST OLD_MIN NEW_MIN DELTA (%) SPEEDUP
ObjectiveCBridgeFromNSDictionaryAnyObjectForced 7502 84320 +1024.0% 0.09x
ObjectiveCBridgeFromNSSetAnyObjectForced 7147 72504 +914.5% 0.10x
ObjectiveCBridgeFromNSSetAnyObject 84228 118593 +40.8% 0.71x
Sim2DArray 13963 17685 +26.7% 0.79x
ObjectiveCBridgeFromNSSetAnyObjectToString 147536 183069 +24.1% 0.81x
ObjectiveCBridgeFromNSDictionaryAnyObject 174993 202470 +15.7% 0.86x
Calculator 869 957 +10.1% 0.91x
ObjectiveCBridgeFromNSDictionaryAnyObjectToString 202190 219979 +8.8% 0.92x(?)
StringWalk 19815 21260 +7.3% 0.93x

Improvement (14)

TEST OLD_MIN NEW_MIN DELTA (%) SPEEDUP
Dictionary3OfObjects 1887 1787 -5.3% 1.06x
SetIntersect_OfObjects 11174 10451 -6.5% 1.07x
Dictionary 1738 1627 -6.4% 1.07x
DictionarySwapOfObjects 18282 16951 -7.3% 1.08x
SetUnion 11550 10692 -7.4% 1.08x
Dictionary3 1311 1204 -8.2% 1.09x
RGBHistogramOfObjects 84380 77559 -8.1% 1.09x
SetIsSubsetOf 2007 1811 -9.8% 1.11x
TwoSum 4682 4222 -9.8% 1.11x
Histogram 9517 8446 -11.2% 1.13x
SetIsSubsetOf_OfObjects 1793 1574 -12.2% 1.14x
RGBHistogram 38000 32440 -14.6% 1.17x
DictionarySwap 5739 4450 -22.5% 1.29x
ArrayOfGenericPOD 5070 3320 -34.5% 1.53x

No Changes (124)

TEST OLD_MIN NEW_MIN DELTA (%) SPEEDUP
ObjectiveCBridgeStubFromNSStringRef 159 152 -4.4% 1.05x
SetIntersect 12297 11729 -4.6% 1.05x
SetExclusiveOr 22273 21203 -4.8% 1.05x
ArrayInClass 4104 3926 -4.3% 1.05x
RangeAssignment 13028 12555 -3.6% 1.04x
StringHasPrefix 1588 1531 -3.6% 1.04x
Dictionary2 3837 3705 -3.4% 1.04x(?)
DictionaryOfObjects 4282 4136 -3.4% 1.04x
SetExclusiveOr_OfObjects 38051 36610 -3.8% 1.04x
ProtocolDispatch 6062 5892 -2.8% 1.03x
NSDictionaryCastToSwift 5836 5658 -3.0% 1.03x(?)
SetUnion_OfObjects 26681 25780 -3.4% 1.03x
DictionaryRemove 16328 15829 -3.1% 1.03x
Prims 12609 12369 -1.9% 1.02x
ObjectAllocation 534 524 -1.9% 1.02x(?)
ObjectiveCBridgeStubURLAppendPath 229451 224560 -2.1% 1.02x(?)
StringHasPrefixUnicode 14557 14283 -1.9% 1.02x
ArrayLiteral 1192 1174 -1.5% 1.02x
ArrayValueProp2 3012 2955 -1.9% 1.02x(?)
Dictionary2OfObjects 5597 5477 -2.1% 1.02x
ArraySubscript 5351 5304 -0.9% 1.01x(?)
RecursiveOwnedParameter 10308 10237 -0.7% 1.01x(?)
AngryPhonebook 2816 2799 -0.6% 1.01x(?)
ProtocolDispatch2 419 416 -0.7% 1.01x
ObjectiveCBridgeToNSArray 29328 29072 -0.9% 1.01x(?)
CaptureProp 111416 110087 -1.2% 1.01x
IterateData 10026 9937 -0.9% 1.01x
ObjectiveCBridgeFromNSArrayAnyObject 74534 74163 -0.5% 1.01x(?)
ObjectiveCBridgeStubDataAppend 3221 3177 -1.4% 1.01x
ArrayOfGenericRef 9486 9431 -0.6% 1.01x(?)
ArrayAppendRepeatCol 203833 201198 -1.3% 1.01x
ObjectiveCBridgeStubNSDateMutationRef 13731 13568 -1.2% 1.01x(?)
MapReduce 43143 42812 -0.8% 1.01x(?)
ArrayAppendSequence 100803 100088 -0.7% 1.01x
DeadArray 114668 113981 -0.6% 1.01x(?)
AnyHashableWithAClass 73326 72560 -1.0% 1.01x(?)
StringHasSuffix 1674 1656 -1.1% 1.01x(?)
ObjectiveCBridgeStubFromNSDate 3742 3697 -1.2% 1.01x(?)
ObjectiveCBridgeToNSString 1044 1039 -0.5% 1.00x
MonteCarloPi 50669 50661 -0.0% 1.00x(?)
PopFrontArray 23038 23046 +0.0% 1.00x(?)
ObjectiveCBridgeStubToNSString 1262 1258 -0.3% 1.00x(?)
ClassArrayGetter 1194 1195 +0.1% 1.00x(?)
Array2D 767171 767412 +0.0% 1.00x(?)
SortStrings 2540 2528 -0.5% 1.00x(?)
StringWithCString 144313 144439 +0.1% 1.00x(?)
ObjectiveCBridgeFromNSArrayAnyObjectForced 9901 9866 -0.3% 1.00x(?)
ObjectiveCBridgeFromNSStringForced 2911 2900 -0.4% 1.00x(?)
SortLettersInPlace 2440 2437 -0.1% 1.00x(?)
ByteSwap 9 9 +0.0% 1.00x
ArrayAppendGenericStructs 1187 1186 -0.1% 1.00x(?)
SuperChars 220623 221082 +0.2% 1.00x(?)
ArrayAppendLazyMap 231580 231099 -0.2% 1.00x(?)
XorLoop 19028 18989 -0.2% 1.00x
StringInterpolation 14863 14850 -0.1% 1.00x(?)
ObserverClosure 6558 6578 +0.3% 1.00x(?)
ArrayAppendStrings 11105 11080 -0.2% 1.00x(?)
ObjectiveCBridgeStubFromNSString 777 776 -0.1% 1.00x(?)
HashTest 4960 4945 -0.3% 1.00x(?)
StrComplexWalk 7205 7220 +0.2% 1.00x(?)
Join 1379 1382 +0.2% 1.00x(?)
ArrayOfRef 8602 8571 -0.4% 1.00x(?)
ObserverUnappliedMethod 8201 8241 +0.5% 1.00x(?)
ObjectiveCBridgeStubDateMutation 487 488 +0.2% 1.00x(?)
NSError 637 637 +0.0% 1.00x
PopFrontArrayGeneric 9151 9154 +0.0% 1.00x(?)
PopFrontUnsafePointer 243951 244247 +0.1% 1.00x(?)
ObjectiveCBridgeStubToNSStringRef 147 147 +0.0% 1.00x
ArrayAppendOptionals 1187 1186 -0.1% 1.00x(?)
DictionaryLiteral 14828 14806 -0.1% 1.00x(?)
Hanoi 18538 18571 +0.2% 1.00x(?)
DictionaryRemoveOfObjects 44042 43889 -0.3% 1.00x(?)
UTF8Decode 41049 41049 +0.0% 1.00x
StringBuilder 2550 2538 -0.5% 1.00x(?)
ObjectiveCBridgeToNSDictionary 60294 60243 -0.1% 1.00x(?)
MonteCarloE 102490 102408 -0.1% 1.00x(?)
RC4 8864 8868 +0.1% 1.00x(?)
Walsh 12457 12436 -0.2% 1.00x(?)
ArrayAppend 3353 3353 +0.0% 1.00x
LinkedList 26020 26008 -0.1% 1.00x(?)
ObjectiveCBridgeFromNSSetAnyObjectToStringForced 107076 107532 +0.4% 1.00x(?)
ArrayAppendArrayOfInt 605 605 +0.0% 1.00x
ArrayOfPOD 2369 2370 +0.0% 1.00x(?)
Chars 4707 4712 +0.1% 1.00x
StrToInt 5509 5498 -0.2% 1.00x(?)
BitCount 91 91 +0.0% 1.00x
ArrayValueProp3 2904 2895 -0.3% 1.00x(?)
ObjectiveCBridgeFromNSArrayAnyObjectToStringForced 87945 87974 +0.0% 1.00x(?)
ArrayValueProp4 2845 2831 -0.5% 1.00x(?)
ObjectiveCBridgeStubFromArrayOfNSString 56148 56346 +0.3% 1.00x(?)
GlobalClass 0 0 +0.0% 1.00x
Memset 19775 19782 +0.0% 1.00x(?)
ArrayAppendReserved 3117 3115 -0.1% 1.00x(?)
SevenBoom 1414 1420 +0.4% 1.00x(?)
ObserverPartiallyAppliedMethod 7870 7857 -0.2% 1.00x(?)
ObjectiveCBridgeFromNSArrayAnyObjectToString 112825 113915 +1.0% 0.99x(?)
Integrate 345 348 +0.9% 0.99x
ErrorHandling 3545 3595 +1.4% 0.99x(?)
StaticArray 32800 33209 +1.2% 0.99x(?)
TypeFlood 169 171 +1.2% 0.99x(?)
StringHasSuffixUnicode 61391 61735 +0.6% 0.99x
ObjectiveCBridgeToNSSet 38634 38842 +0.5% 0.99x(?)
SortStringsUnicode 8844 8911 +0.8% 0.99x
ObjectiveCBridgeStubToArrayOfNSString 28024 28193 +0.6% 0.99x(?)
Phonebook 59089 59726 +1.1% 0.99x(?)
ObserverForwarderStruct 4934 4964 +0.6% 0.99x(?)
ArrayValueProp 2470 2483 +0.5% 0.99x
ObjectiveCBridgeStubNSDataAppend 2618 2633 +0.6% 0.99x(?)
StackPromo 120416 122913 +2.1% 0.98x(?)
ObjectiveCBridgeStubFromNSDateRef 3818 3888 +1.8% 0.98x
ObjectiveCBridgeStubToNSDateRef 3093 3159 +2.1% 0.98x(?)
StringEqualPointerComparison 9032 9218 +2.1% 0.98x
PolymorphicCalls 1078 1095 +1.6% 0.98x
ObjectiveCBridgeFromNSDictionaryAnyObjectToStringForced 126170 128188 +1.6% 0.98x(?)
ObjectiveCBridgeStubNSDateRefAccess 1161 1187 +2.2% 0.98x
ObjectiveCBridgeFromNSString 4828 4913 +1.8% 0.98x(?)
NSStringConversion 2820 2868 +1.7% 0.98x(?)
DictionaryBridge 3635 3729 +2.6% 0.97x(?)
ObjectiveCBridgeStubURLAppendPathRef 222613 229113 +2.9% 0.97x(?)
OpenClose 402 419 +4.2% 0.96x
ObjectiveCBridgeStubDateAccess 1004 1049 +4.5% 0.96x
146 5677095 5897647 +3.9% 0.96x
ObjectiveCBridgeStubToNSDate 12923 13573 +5.0% 0.95x(?)
NopDeinit 54828 57822 +5.5% 0.95x
**Hardware Overview** Model Name: Mac mini Model Identifier: Macmini7,1 Processor Name: Intel Core i7 Processor Speed: 3 GHz Number of Processors: 1 Total Number of Cores: 2 L2 Cache (per Core): 256 KB L3 Cache: 4 MB Memory: 16 GB

default: return nil
}
}
}
}
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Note to self: upon reflection this fix is dubious; it implies the motivation for this type is no longer happening. Need to investigate what the point of this really is.

Also note: the existing implementation appears to also have UB (strict aliasing violation).

Alexis Beingessner added 4 commits November 14, 2016 14:20
Note: this commit has several TODOs that are resolved in the next
commit.
* Some tests were removed because they exclusively check for lazy bridge
  behaviour
* Many checks for objc/native-ness were removed as meaningless
* Many checks for identity were updated (or removed) for new semantics
* Trap checks were updated to reflect more eager semantics
* A keysEnumerator() impl had to be added as the new design touches it
* Some tests that randomly touch impl details were updated
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Gankra commented Nov 14, 2016

@swift-ci please smoke test

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Gankra commented Nov 14, 2016

rebased and added updates to reflection tests. Annoyingly, updating the size of a type means all the offsets get messed up.

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Gankra commented Nov 14, 2016

@slavapestov is verifying the offsets (which are naturally just the sum of strides) really interesting?

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Hi @gankro can you hold off landing this until I land some resilience fixes? Your previous changes broke the resilient build and I'm still debugging them.

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Gankra commented Nov 14, 2016

@slavapestov this won't land for a long while; these branches are mostly here so everyone who wants to evaluate their consequences can.

Also: dang I'm really sorry about constantly breakinn resilience :(

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No worries, it's good to shake all the bugs out.

@CodaFi
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CodaFi commented Nov 14, 2019

It looks like we never did get around to eager bridging. Should this remain open @Gankra?

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Gankra commented Nov 18, 2019

i feel like y'all should maybe have a better understanding of what your project should do than me, someone who hasn't worked here for 3 years?

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CodaFi commented Nov 19, 2019

@Gankra Very well. Thank you for all the work that went into this patch. I'm just sorry we weren't able to take it at the time.

I've spoken to the stdlib folk and they believe there may still be limited cases where this optimization makes sense. I've filed SR-11805 to see if an external contributor would like to take up the mantle at some point in the future. With luck, your patch may yet make it through!

@CodaFi CodaFi closed this Nov 19, 2019
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4 participants