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Re: [Libunwind-devel] Time Cost of Libunwind is too expensive.

From: Paul Pluzhnikov
Subject: Re: [Libunwind-devel] Time Cost of Libunwind is too expensive.
Date: Wed, 26 Nov 2014 09:30:06 -0800

On Tue, Nov 25, 2014 at 8:42 PM, Chenggang <address@hidden> wrote:

> All programs are wrote by C/C++, compiler is GCC/G++, the version is 4.1.2.

Please note that this compiler is quite old, and is known to produce
incomplete and/or incorrect unwind info.

That in turn causes libunwind to take slow path under some conditions
(though I believe that this is more pronounced with in-process
unwinding), and may be a contributing factor here.

Paul Pluzhnikov

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