private void _InitializeLazyMatch()
{
window_size = 2 * w_size;
// clear the hash - workitem 9063
Array.Clear(head, 0, hash_size);
//for (int i = 0; i < hash_size; i++) head[i] = 0;
config = Config.Lookup(compressionLevel);
SetDeflater();
strstart = 0;
block_start = 0;
lookahead = 0;
match_length = prev_length = MIN_MATCH - 1;
match_available = 0;
ins_h = 0;
}