ios - Leak when downloading with AFNetworking -

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basically when file done downloading, there's "something" in memory never gets released. here's simplistic example of code causing problem, memory goes around 50mb , sits there , never gets released (see screenshots below). idea of what's going on?

-(void)download {     nsstring* urlstring = @"http://download.thinkbroadband.com/50mb.zip";     nsmutableurlrequest* request = [nsmutableurlrequest requestwithurl:[nsurl urlwithstring:urlstring]];     afhttprequestoperation* operation = [[afhttprequestoperation alloc] initwithrequest:request];      [operation setdownloadprogressblock:^(nsuinteger bytesread, long long totalbytesread, long long totalbytesexpectedtoread) {         nslog(@"%lldmb of %lldmb downloaded", totalbytesread / 1024 / 1024, totalbytesexpectedtoread / 1024 / 1024);     }];      [operation setcompletionblockwithsuccess:^(__weak afhttprequestoperation *operation, id responseobject) {         nslog(@"download completed.");     } failure:^(afhttprequestoperation *operation, nserror *error) {         nslog(@"error: %@", error.localizeddescription);     }];      [operation start]; }

before download:

enter image description here

after download:

enter image description here

in own testing on ios 8.1 using afnetworking 2.5, appears case in debug not release mode. given code didn't work is, made following test case:

- (ibaction)startdownload:(uibutton *)sender  {     nsstring *downloadurlstring = @"http://mirror.internode.on.net/pub/test/50meg.test";     nsurlrequest *request = [nsurlrequest requestwithurl:[nsurl urlwithstring:downloadurlstring]];     afhttprequestoperationmanager *manager = [afhttprequestoperationmanager manager];     manager.responseserializer = [afhttpresponseserializer serializer];     afhttprequestoperation *operation = [manager httprequestoperationwithrequest:request success:^(afhttprequestoperation *operation, id responseobject) {         nslog(@"download succeeded.");         self.statelabel.text = @"download succeeded.";     } failure:^(afhttprequestoperation *operation, nserror *error) {         nslog(@"download failed error: %@", error);         self.statelabel.text = @"download failed.";     }];      [operation setdownloadprogressblock:^(nsuinteger bytesread, long long totalbytesread, long long totalbytesexpectedtoread) {         nslog(@"bytes read: %lu", bytesread);         nslog(@"total bytes read %lld", totalbytesread);         nslog(@"total progress: %lf", (long double)totalbytesread / totalbytesexpectedtoread);         self.progressview.progress = (long double)totalbytesread / totalbytesexpectedtoread;     }];      nslog(@"starting download.");     nsoperationqueue *downloadqueue = [[nsoperationqueue alloc] init];     [downloadqueue addoperation:operation]; }

with code, once download complete, in release mode, memory usage drops pre download level.


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