gistfile1.txt

void parseLargeModel(){
    
    // Reading from file
    //NSString *jsonPath = [[NSBundle mainBundle] pathForResource:@"JSONData" ofType:@"json"];
    NSString *jsonPath = @"/Users/steve/junk2/MJExtension/MJExtensionExample/MJExtensionExample/JSONData.json";
    
    // Creating array of dictionary.
    NSError *err;
    NSArray *receivedJSONArray = [NSJSONSerialization JSONObjectWithData:[NSData dataWithContentsOfFile:jsonPath] options:0 error:&err];
    
    if(err)
        NSLog(@"Error %@",err);
        
        NSDate *startDate = [NSDate date];
        NSArray *largeModelArray = [LargeModel objectArrayWithKeyValuesArray:receivedJSONArray];
        NSDate *endDate = [NSDate date];
        
        /*
        
            for (int i = 0; i < 10; i++) {
                LargeModel *testModel1 = [largeModelArray objectAtIndex:i];
                NSLog(@"test Model 1 %@",testModel1.jcol10);
            }
    */
        
        NSLog(@"%@",[NSString stringWithFormat:@"Successfully parsed %ld records in %f seconds.",[largeModelArray count],[endDate timeIntervalSinceDate:startDate]]);
    
}

LargeModel.h

#import <Foundation/Foundation.h>

@interface LargeModel : NSObject
@property (nonatomic, strong) NSString *jcol0;
@property (nonatomic, strong) NSString *jcol1;
@property (nonatomic, strong) NSString *jcol2;
@property (nonatomic, strong) NSString *jcol3;
@property (nonatomic, strong) NSString *jcol4;
@property (nonatomic, strong) NSString *jcol5;
@property (nonatomic, strong) NSString *jcol6;
@property (nonatomic, strong) NSString *jcol7;
@property (nonatomic, strong) NSString *jcol8;
@property (nonatomic, strong) NSString *jcol9;
@property (nonatomic, strong) NSString *jcol10;
@property (nonatomic, strong) NSString *jcol11;
@property (nonatomic, strong) NSString *jcol12;
@property (nonatomic, strong) NSString *jcol13;
@property (nonatomic, strong) NSString *jcol14;
@property (nonatomic, strong) NSString *jcol15;
@property (nonatomic, strong) NSString *jcol16;
@property (nonatomic, strong) NSString *jcol17;
@property (nonatomic, strong) NSString *jcol18;
@property (nonatomic, strong) NSString *jcol19;
@property (nonatomic, strong) NSString *jcol20;
@property (nonatomic, strong) NSString *jcol21;
@property (nonatomic, strong) NSString *jcol22;
@property (nonatomic, strong) NSString *jcol23;
@property (nonatomic, strong) NSString *jcol24;
@property (nonatomic, strong) NSString *jcol25;
@property (nonatomic, strong) NSString *jcol26;
@property (nonatomic, strong) NSString *jcol27;
@property (nonatomic, strong) NSString *jcol28;
@property (nonatomic, strong) NSString *jcol29;
@property (nonatomic, strong) NSString *jcol30;
@property (nonatomic, strong) NSString *jcol31;
@property (nonatomic, strong) NSString *jcol32;
@property (nonatomic, strong) NSString *jcol33;
@property (nonatomic, strong) NSString *jcol34;
@property (nonatomic, strong) NSString *jcol35;
@property (nonatomic, strong) NSString *jcol36;
@property (nonatomic, strong) NSString *jcol37;
@property (nonatomic, strong) NSString *jcol38;
@property (nonatomic, strong) NSString *jcol39;
@property (nonatomic, strong) NSString *jcol40;
@property (nonatomic, strong) NSString *jcol41;
@property (nonatomic, strong) NSString *jcol42;
@property (nonatomic, strong) NSString *jcol43;
@property (nonatomic, strong) NSString *jcol44;
@property (nonatomic, strong) NSString *jcol45;
@property (nonatomic, strong) NSString *jcol46;
@property (nonatomic, strong) NSString *jcol47;
@property (nonatomic, strong) NSString *jcol48;
@property (nonatomic, strong) NSString *jcol49;
@property (nonatomic, strong) NSString *jcol50;
@property (nonatomic, strong) NSString *jcol51;
@property (nonatomic, strong) NSString *jcol52;
@property (nonatomic, strong) NSString *jcol53;
@property (nonatomic, strong) NSString *jcol54;
@property (nonatomic, strong) NSString *jcol55;
@property (nonatomic, strong) NSString *jcol56;
@property (nonatomic, strong) NSString *jcol57;
@property (nonatomic, strong) NSString *jcol58;
@property (nonatomic, strong) NSString *jcol59;
@property (nonatomic, strong) NSString *jcol60;
@property (nonatomic, strong) NSString *jcol61;
@property (nonatomic, strong) NSString *jcol62;
@property (nonatomic, strong) NSString *jcol63;
@property (nonatomic, strong) NSString *jcol64;
@property (nonatomic, strong) NSString *jcol65;
@property (nonatomic, strong) NSString *jcol66;
@property (nonatomic, strong) NSString *jcol67;
@property (nonatomic, strong) NSString *jcol68;
@property (nonatomic, strong) NSString *jcol69;
@property (nonatomic, strong) NSString *jcol70;
@property (nonatomic, strong) NSString *jcol71;
@property (nonatomic, strong) NSString *jcol72;
@property (nonatomic, strong) NSString *jcol73;
@property (nonatomic, strong) NSString *jcol74;
@property (nonatomic, strong) NSString *jcol75;
@property (nonatomic, strong) NSString *jcol76;
@property (nonatomic, strong) NSString *jcol77;
@property (nonatomic, strong) NSString *jcol78;
@property (nonatomic, strong) NSString *jcol79;
@property (nonatomic, strong) NSString *jcol80;
@property (nonatomic, strong) NSString *jcol81;
@property (nonatomic, strong) NSString *jcol82;
@property (nonatomic, strong) NSString *jcol83;
@property (nonatomic, strong) NSString *jcol84;
@property (nonatomic, strong) NSString *jcol85;
@property (nonatomic, strong) NSString *jcol86;
@property (nonatomic, strong) NSString *jcol87;
@property (nonatomic, strong) NSString *jcol88;
@property (nonatomic, strong) NSString *jcol89;
@property (nonatomic, strong) NSString *jcol90;
@property (nonatomic, strong) NSString *jcol91;
@property (nonatomic, strong) NSString *jcol92;
@property (nonatomic, strong) NSString *jcol93;
@property (nonatomic, strong) NSString *jcol94;
@property (nonatomic, strong) NSString *jcol95;
@property (nonatomic, strong) NSString *jcol96;
@property (nonatomic, strong) NSString *jcol97;
@property (nonatomic, strong) NSString *jcol98;
@property (nonatomic, strong) NSString *jcol99;
@property (nonatomic, strong) NSString *jcol100;
@property (nonatomic, strong) NSString *jcol101;
@end

LargeModel.m

#import "LargeModel.h"

@implementation LargeModel

@end