property

ZlibCompressionOptions.windowBits

windowBits?: 25 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 28 | -9 | -10 | -11 | -12 | -13 | -14 | -15 | 26 | 27 | 29 | 30 | 31

The base 2 logarithm of the window size (the size of the history buffer).

Larger values of this parameter result in better compression at the expense of memory usage.

The following value ranges are supported:

  • 9..15: The output has a zlib header and footer (Deflate)
  • -9..-15: The output does not have a zlib header or footer (Raw Deflate)
  • 25..31 (16+9..15): The output has a gzip header and footer (gzip)

The gzip header has no file name, no extra data, no comment, no modification time (set to zero) and no header CRC.