memory leaking while extracting 40GB archive

[axet]

Describe the bug

Using py7z extracting big archive causing 30GB memory used by process.

Related issue

#575

To Reproduce

1. get 40GB archive
2. prepare extract python script (see below)
3. run it

import sys
import os
import py7zr
import time
import io

class DecompressFile(io.IOBase):

  def __init__(self, zipf, zi):
    self.fp = zipf.fp
    self.src_end = zipf.afterheader + zipf.header.main_streams.packinfo.packpositions[-1]
    self.out_remaining = zi.uncompressed
    self.crc32 = 0
    self.decompressor = zi.folder.get_decompressor(zi.compressed, zi.compressed is not None)

  def read(self, size):
    m = min(self.out_remaining, py7zr.properties.get_memory_limit(), size)
    tmp = self.decompressor.decompress(self.fp, m)
    self.out_remaining -= len(tmp)
    self.crc32 = py7zr.helpers.calculate_crc32(tmp, self.crc32)
    if self.fp.tell() >= self.src_end:
      if self.decompressor.crc is not None and not self.decompressor.check_crc():
          raise py7zr.exceptions.CrcError(self.decompressor.crc, self.decompressor.digest, None)
    return tmp

def extract(ifn):
  with py7zr.SevenZipFile(ifn) as zipf:
      for zi in zipf.files:
        print (zi.filename)
        if not zi.is_directory and zi.uncompressed > 0:
          d = DecompressFile(zipf, zi)
          while d.read(1024*1024):
            pass
          if d.crc32 != zi.crc32:
            raise py7zr.exceptions.CrcError(d.crc32, zi.crc32, zi.filename)

extract("40G.7z")

Expected behavior

Memory consumed 5-10GB not 30G+

Environment (please complete the following information):

• OS: debian trixie
• Python 3.12.7
• py7zr version: 0.22.0+dfsg-1