diff options
Diffstat (limited to 'Lib/multiprocessing')
| -rw-r--r-- | Lib/multiprocessing/heap.py | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/Lib/multiprocessing/heap.py b/Lib/multiprocessing/heap.py index 333b3ba..44d9638 100644 --- a/Lib/multiprocessing/heap.py +++ b/Lib/multiprocessing/heap.py @@ -71,7 +71,14 @@ else: os.unlink(name) util.Finalize(self, os.close, (self.fd,)) with open(self.fd, 'wb', closefd=False) as f: - f.write(b'\0'*size) + bs = 1024 * 1024 + if size >= bs: + zeros = b'\0' * bs + for _ in range(size // bs): + f.write(zeros) + del zeros + f.write(b'\0' * (size % bs)) + assert f.tell() == size self.buffer = mmap.mmap(self.fd, self.size) def reduce_arena(a): |