lukaszmargielewski

 // For stackoverflow question: 
 // http://stackoverflow.com/questions/30445801/ios8-metal-compute-pipeline-slower-than-cpu
 
 // I. CODE INVOKED ONCE, AT THE INIT STAGE:
 
 _mtlCharTable       = [_mtlDevice newBufferWithBytes:_charTable->pointer length:_charTable->bytesTotal options:0];
 _mtlSearchMasks     = [_mtlDevice newBufferWithBytesNoCopy:_searchIndexes.mask length:_searchIndexes.bytesTotalMask options:0 deallocator:nil];
                           
    //iPhone 6: maxTotalThreadsPerThreadgroup: 512, threadExecutionWidth: 32
    uint threadsPerThreadGroup = [_mtlComputePipelineState maxTotalThreadsPerThreadgroup];// / 4.0;