| From: | AMatveev(at)bitec(dot)ru |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Jan Wieck <jan(at)wi3ck(dot)info>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Craig Ringer <craig(at)2ndquadrant(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: One process per session lack of sharing |
| Date: | 2016-07-19 11:18:22 |
| Message-ID: | 514225797.20160719141822@bitec.ru |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Hi
> Using TLS will slow down things noticeably though. So if we were to go
> there, we'd have to make up for some constant slowdown.
I can not understand why?
I've read
https://msdn.microsoft.com/en-us/library/windows/desktop/ms686749(v=vs.85).aspx
and
http://david-grs.github.io/tls_performance_overhead_cost_linux/
"""
The results are quite straightforward: no overhead at all.
"""
0x0000000000404f40 <+0>: inc DWORD PTR [rip+0x202382]
vs
0x0000000000404f50 <+0>: inc DWORD PTR fs:0xfffffffffffffffc
It's clear.
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