From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by finch.gentoo.org (Postfix) with ESMTPS id 94E33139083 for ; Wed, 6 Dec 2017 23:41:38 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 705A5E103E; Wed, 6 Dec 2017 23:41:33 +0000 (UTC) Received: from mail-wr0-x22c.google.com (mail-wr0-x22c.google.com [IPv6:2a00:1450:400c:c0c::22c]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id E7F77E1021 for ; Wed, 6 Dec 2017 23:41:32 +0000 (UTC) Received: by mail-wr0-x22c.google.com with SMTP id v105so5637471wrc.3 for ; Wed, 06 Dec 2017 15:41:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:reply-to:subject:date:message-id:in-reply-to:references :mime-version; bh=8dO29nV3ofNrSMKQp1m1npTpETXYaZJq+Ub1JYndxYU=; b=psRClBBEHbTAWHYbr2znULN+lfJksJ/Du5nKlQqByCfO4j2NkPgNXRdAB69xxYQw6Q 9jh9vuQA6AoYs+i4XhNVNlN1ZRXi51/Oo8uCDJnp/H8kPUwi9zMHYLTr+hQSCqm2q4xR t1nTTiox38aEIMPatD+p47+6VuemGxKYaV0RpHERXDslBfKHYUlpuxA9YAHZW6uRWSkD ZNDKIlldCf76KjXeKoIo8P/DNwAqiQoOK0BBk1x2r0MjusitbTrzS2ja9NXMdArOxJbk B1RBP7ZA9FEoKclHs7j13dtz+Gx882e4LYf0CA64XnRLEFsspDMMB9lVrapkqN7tOJJl yPFg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:reply-to:subject:date:message-id :in-reply-to:references:mime-version; bh=8dO29nV3ofNrSMKQp1m1npTpETXYaZJq+Ub1JYndxYU=; b=r8VlzP3T13jdGcf1MUvXf6uZKO/Oaupz/x6sRYoz+EFWnBZPJVtjqoDCO4U0qtrAa5 hH46X/o6PPfYuGhamivZYefXcqR60BeYRwNvBvGq6eibv8e7/My1/U5RRCAEwaOJYGTq ZKHiU2rgA+dVZa3/b+2cdiLTLaP2iKAAe9y0rZyml9j2BzaO2DwkNziG1ZimaVIhh0jr 7m/GQs9AhDL4P8KQMu8v2VtQaaztsV0IOH1wuW0WP0frIIhb5yZQagypHpA2W5xbAhRH za2Y5nLxRPqgOpFcQH5WE4uWvbN6MHW3KT3lv5kjgRdR5aYbvLEESYxJQf1S0W0DCrDi PY2w== X-Gm-Message-State: AJaThX7EeVm2tRc5FynRxTdykqY96qI9LTPfd+jsv7FJM4xLmd7vOK3C fgKgC+aPWLulEE54t2sasvDdzw== X-Google-Smtp-Source: AGs4zMbMk6bOoWncIL4mgA5PGNrIMpOyjM9POk4qPE+3zJRE7ZIe4AFpVdXltjtJVcjwfts1X457CQ== X-Received: by 10.223.190.9 with SMTP id n9mr22573354wrh.46.1512603691362; Wed, 06 Dec 2017 15:41:31 -0800 (PST) Received: from dell_xps.localnet (230.3.169.217.in-addr.arpa. [217.169.3.230]) by smtp.gmail.com with ESMTPSA id l142sm4057925wmb.43.2017.12.06.15.41.30 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 06 Dec 2017 15:41:30 -0800 (PST) From: Mick To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Puzzled with duration of chromium emerge under profile 17.0 Date: Wed, 06 Dec 2017 23:41:32 +0000 Message-ID: <10747370.tWLaCRfCi3@dell_xps> In-Reply-To: References: <52162893.CLl5pjoF1h@dell_xps> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart2779910.hV9kk7Udkp"; micalg="pgp-sha256"; protocol="application/pgp-signature" X-Archives-Salt: a9292a5b-f36b-42f8-9304-568a132f537e X-Archives-Hash: 4dbebb97ea6865de10f4e730907ccde3 --nextPart2779910.hV9kk7Udkp Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" On Wednesday, 6 December 2017 20:13:50 GMT Alan McKinnon wrote: > On 06/12/2017 21:10, Mick wrote: > > I discovered that building Chromium with gcc-6.4.0 is taking an > > inordinately>=20 > > longer time on a laptop with 1st gen i7 and 4G of RAM, e.g.: [snip...] > Pure gut feel and intuition and nothing else leads me to look in two plac= es: >=20 > You use -march=3Dnative on the i7 so I assume the same on the Core2? Those > are rather different processors, and google is fond of optimizing deeply > for specific cases (common to all browsers I think). You'd have to ask a > chromium hacker but I'd say the odds are good there are serious > optimizations for i7 that stress your compiler out muchly. Yes, I run -march=3Dnative on both. > Add to that your i7 is RAM-constrained so you compensate with swap, > which is easily 50,000 times slower with sucky latency.=20 Yes, it's ridiculously slow! :-( > When you use a > disk as RAM, performance tanks. Well, usually it causes a cascade effect > and stuff blows up, but if it completes it will have done so slowly. >=20 > If you at all can, shove lots more RAM in that i7. These days RAM is > cheap and it's always by first performance tweak, then SSD. I know that compiling in RAM would be done in a fraction of the time. The= =20 thing is, this is a 8 year old laptop and I am resisting throwing good mone= y=20 after bad. I had a quick look a few months ago and good quality memory wil= l=20 cost me around =C2=A360. With the battery shot and the keyboard on its way= out,=20 I'd rather put the money towards more memory for a newer PC, sometime in th= e=20 next year. ;-) =2D-=20 Regards, Mick --nextPart2779910.hV9kk7Udkp Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part. Content-Transfer-Encoding: 7Bit -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEt7MNaGaS6HvTUrEz6WnU8jC95dcFAloogCwACgkQ6WnU8jC9 5ddf5BAAsW/WhlXVn2ujlzWTu4MGMbGHL2niJV94SJQOqJ5Fz+UJkdt0Ons18PK0 kOveDS2zm0ftsV8lnzvlenu4PUiH7zV4oa/EWc+/3XqWQnaFgLV7XK8o0DmPJLJG YhKpSbod+M/fPfVYonfNsWucTCWIRKub+Rzr4Q3UpCy2Dle6AkExuUG2cAVviPJ5 /nSECmrgthrShc+Idlb/TVs3ju4NoVmkdpRNM9YUEBYEciEN8/iHNM8R4xgF5muR EyYY/qp3o8dOo6LSB7tR3XJRlZZvPYnsQe8k2WLbIxQT4JuGsQ//xZHVogE/YhJ2 kbwWAFe4BtCew7Oi0owMZQ3MNd5bA7vMP5E+a9q2jlojtHB9o4HdzUo/erGXTR66 LJ8NfF45iSycBpYlCp0H1D08Cwse9EKhiyl/fsl3lS+BjcFIAVGfOKxN4w47QXR+ pyf5xVxnGNc5+8kYpcvyora87z2cpqgJhV3oqbJ1wIxCgJNavYRWm5aRlUSrNJeW vuhQBx7aLnY2dbsbvFqyc5mu/roG3OfXy/q0j++D5BRiywSEGXwaejNZSsDJjBAH duCpdsk/tnJzqo7qflpNaG6BSacJGR/ckGvcBj9RTt6Lx2qFxp+UwQ9Dh82VQqmV RuwgSZ2vUh5f5oi+bp3TqJwBRZdA7EjZQlVBHL+rPWxpGLO7pcs= =A/Ga -----END PGP SIGNATURE----- --nextPart2779910.hV9kk7Udkp--