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Tue, 26 Apr 2022 17:55:43 -0700 (PDT) MIME-Version: 1.0 References: <20220425192036.p6awbyro2a2lp7bq@chazelas.org> <7E5CB0D9-4740-486A-B55E-6EA0530532F9@kba.biglobe.ne.jp> <875081227.118208.1650986156051@mail2.virginmedia.com> In-Reply-To: <875081227.118208.1650986156051@mail2.virginmedia.com> From: Bart Schaefer Date: Tue, 26 Apr 2022 17:55:31 -0700 Message-ID: Subject: Re: ZSH performance regression in 5.8.1.2-test To: Zsh hackers list Content-Type: multipart/mixed; boundary="000000000000d93f0305dd98440d" X-Seq: 50111 Archived-At: X-Loop: zsh-workers@zsh.org Errors-To: zsh-workers-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-workers-request@zsh.org X-no-archive: yes List-Id: List-Help: List-Subscribe: List-Unsubscribe: List-Post: List-Owner: List-Archive: --000000000000d93f0305dd98440d Content-Type: text/plain; charset="UTF-8" On Tue, Apr 26, 2022 at 8:16 AM Peter Stephenson wrote: > > We could use some variant of the following as a configure test for safety. I will be happiest if someone else plugs that in to configure.ac. Here's the patch again, replacing fstat with lseek. --000000000000d93f0305dd98440d Content-Type: text/plain; charset="US-ASCII"; name="sysread.txt" Content-Disposition: attachment; filename="sysread.txt" Content-Transfer-Encoding: base64 Content-ID: X-Attachment-Id: f_l2gv8dya0 ZGlmZiAtLWdpdCBhL1NyYy9pbnB1dC5jIGIvU3JjL2lucHV0LmMKaW5kZXggYzU5MjMyNjgxLi44 ZTBhMjRmOTIgMTAwNjQ0Ci0tLSBhL1NyYy9pbnB1dC5jCisrKyBiL1NyYy9pbnB1dC5jCkBAIC0y MTcsMTIgKzIxNywzMSBAQCBzaGluYnVmcmVzdG9yZSh2b2lkKQogc3RhdGljIGludAogc2hpbmdl dGNoYXIodm9pZCkKIHsKLSAgICBpbnQgbnJlYWQ7CisgICAgaW50IG5yZWFkLCByc2l6ZSA9IGlz c2V0KFNISU5TVERJTikgPyAxIDogU0hJTkJVRlNJWkU7CiAKICAgICBpZiAoc2hpbmJ1ZnB0ciA8 IHNoaW5idWZlbmRwdHIpCiAJcmV0dXJuIFNUT1VDKCpzaGluYnVmcHRyKyspOwotCisgICAgZWxz ZSBpZiAocnNpemUgPT0gMSAmJiBsc2VlayhTSElOLCAwLCBTRUVLX0NVUikgPT0gMCkKKwlyc2l6 ZSA9IFNISU5CVUZTSVpFOwogICAgIHNoaW5idWZyZXNldCgpOworICAgIGlmIChyc2l6ZSA+IDEp IHsKKwlkbyB7CisJICAgIGVycm5vID0gMDsKKwkgICAgbnJlYWQgPSByZWFkKFNISU4sIHNoaW5i dWZmZXIsIHJzaXplKTsKKwl9IHdoaWxlIChucmVhZCA8IDAgJiYgZXJybm8gPT0gRUlOVFIpOwor CWlmIChucmVhZCA8PSAwKQorCSAgICByZXR1cm4gLTE7CisJaWYgKGlzc2V0KFNISU5TVERJTikg JiYKKwkgICAgKHNoaW5idWZlbmRwdHIgPSBtZW1jaHIoc2hpbmJ1ZmZlciwgJ1xuJywgbnJlYWQp KSkgeworCSAgICBzaGluYnVmZW5kcHRyKys7CisJICAgIHJzaXplID0gKHNoaW5idWZlbmRwdHIg LSBzaGluYnVmZmVyKTsKKwkgICAgaWYgKG5yZWFkID4gcnNpemUgJiYKKwkJbHNlZWsoU0hJTiwg LShucmVhZCAtIHJzaXplKSwgU0VFS19DVVIpIDwgMCkKKwkJemVycigibHNlZWsoJWQsICVkKTog JWUiLCBTSElOLCAtKG5yZWFkIC0gcnNpemUpLCBlcnJubyk7CisJfSBlbHNlCisJICAgIHNoaW5i dWZlbmRwdHIgPSBzaGluYnVmZmVyICsgbnJlYWQ7CisJcmV0dXJuIFNUT1VDKCpzaGluYnVmcHRy KyspOworICAgIH0KICAgICBmb3IgKDs7KSB7CiAgICAgICAgZXJybm8gPSAwOwogICAgICAgIG5y ZWFkID0gcmVhZChTSElOLCBzaGluYnVmZW5kcHRyLCAxKTsK --000000000000d93f0305dd98440d--