Z_FILTERED        534 third_party/libpng/pngwutil.c          png_ptr->zlib_strategy = Z_FILTERED;
Z_FILTERED       1846 third_party/zlib/deflate.c             if (s->match_length <= 5 && (s->strategy == Z_FILTERED
Z_FILTERED        130 third_party/zlib/gzlib.c                 state->strategy = Z_FILTERED;