Comments on: Speed up application load time in Ubuntu Linux Hardy Heron using prelink: HOWTO and benchmarks http://www.quintinriis.com/speed-up-application-load-time-in-ubuntu-linux-using-prelink-howto-and-benchmarks/ Thu, 11 Mar 2010 20:16:29 +0000 http://wordpress.org/?v=2.5 By: Speed up your Ubuntu Linux boot! | Nobody was Born with Linux Knowledge http://www.quintinriis.com/speed-up-application-load-time-in-ubuntu-linux-using-prelink-howto-and-benchmarks/#comment-8683 Speed up your Ubuntu Linux boot! | Nobody was Born with Linux Knowledge Mon, 15 Dec 2008 09:16:01 +0000 http://www.quintinriis.com/?p=36#comment-8683 [...] with performance benchmarks here http://www.quintinriis.com http://ubuntuforums.org/showthread.php?t=1971 [...] […] with performance benchmarks here http://www.quintinriis.com http://ubuntuforums.org/showthread.php?t=1971 […]

]]> By: the http://www.quintinriis.com/speed-up-application-load-time-in-ubuntu-linux-using-prelink-howto-and-benchmarks/#comment-6498 the Thu, 13 Nov 2008 18:30:01 +0000 http://www.quintinriis.com/?p=36#comment-6498 prelink mess up with OSSEC or any other integrity checking tools. The benefits are so minuscule that it's really not worth it. It saved average Joe Schmo 18 seconds in a week, multiply it by 1000 users for a an average enterprise - 5 hours! Wow! Huge increase in productivity! It's 50% of what was achieved last year by oiling the door hinges in the bathrooms!! Now subtract time spent by security IT guy trying to figure out why md5 checksum on /bin/login changed on 1000 systems, cost of disk space on corporate email system where all alerts went, time spent by IT manager reading the analysis on the incident report for false alert. And that is only if those alerts didn't trigger pager escalation and manager didn't call for 2 hour meeting with 15 people to resolve "rootkit issue". And in general, it's bad, very bad idea. It's like crutches for person with broken leg - sure it helps, but may be you should not use that person as mail courier. prelink mess up with OSSEC or any other integrity checking tools.
The benefits are so minuscule that it’s really not worth it.
It saved average Joe Schmo 18 seconds in a week, multiply it by 1000 users for a an average enterprise - 5 hours! Wow! Huge increase in productivity! It’s 50% of what was achieved last year by oiling the door hinges in the bathrooms!!
Now subtract time spent by security IT guy trying to figure out why md5 checksum on /bin/login changed on 1000 systems, cost of disk space on corporate email system where all alerts went, time spent by IT manager reading the analysis on the incident report for false alert. And that is only if those alerts didn’t trigger pager escalation and manager didn’t call for 2 hour meeting with 15 people to resolve “rootkit issue”.
And in general, it’s bad, very bad idea. It’s like crutches for person with broken leg - sure it helps, but may be you should not use that person as mail courier.

]]> By: www.ubuntukungfu.org http://www.quintinriis.com/speed-up-application-load-time-in-ubuntu-linux-using-prelink-howto-and-benchmarks/#comment-557 www.ubuntukungfu.org Tue, 22 Jul 2008 09:23:53 +0000 http://www.quintinriis.com/?p=36#comment-557 <strong>Speed up application load time in Ubuntu Linux Hardy Heron using prelink...</strong> How to setup prelink (system optimization tool), and also some benchmarks to show if it actually helps performance... Speed up application load time in Ubuntu Linux Hardy Heron using prelink…

How to setup prelink (system optimization tool), and also some benchmarks to show if it actually helps performance…

]]> By: web design company http://www.quintinriis.com/speed-up-application-load-time-in-ubuntu-linux-using-prelink-howto-and-benchmarks/#comment-78 web design company Wed, 18 Jun 2008 15:52:23 +0000 http://www.quintinriis.com/?p=36#comment-78 Nice and very useness for us the linux users :D ;) Nice and very useness for us the linux users :D ;)

]]> By: Quintin Riis http://www.quintinriis.com/speed-up-application-load-time-in-ubuntu-linux-using-prelink-howto-and-benchmarks/#comment-77 Quintin Riis Wed, 18 Jun 2008 08:31:33 +0000 http://www.quintinriis.com/?p=36#comment-77 Whether or not prelinking happens when you are using your computer depends on the individual use case. In my case it does not, since my computer is always on. I do not believe the net result is zero or less than zero. If you do, please find a scientific way to make your case. I'm probably going to do more extensive tests with more varied hardware to compare the results. I hypothesize that the results on older computers will be more substantial. Whether or not prelinking happens when you are using your computer depends on the individual use case. In my case it does not, since my computer is always on.

I do not believe the net result is zero or less than zero. If you do, please find a scientific way to make your case.

I’m probably going to do more extensive tests with more varied hardware to compare the results. I hypothesize that the results on older computers will be more substantial.

]]> By: Frederik http://www.quintinriis.com/speed-up-application-load-time-in-ubuntu-linux-using-prelink-howto-and-benchmarks/#comment-76 Frederik Wed, 18 Jun 2008 08:23:27 +0000 http://www.quintinriis.com/?p=36#comment-76 It saves (a very minimal amount of) time starting up apps, but it costs CPU and more importantly I/O time prelinking apps which happens while you use your computer, so it slows down running applications at that moment (especially on laptops with slower hard drives). If you add this to the calculation, the netto effect will certainly be negative. It's more a psychological solution for people who think their computer will become faster with a small software hack. But of course you are free to believe it :-) It saves (a very minimal amount of) time starting up apps, but it costs CPU and more importantly I/O time prelinking apps which happens while you use your computer, so it slows down running applications at that moment (especially on laptops with slower hard drives). If you add this to the calculation, the netto effect will certainly be negative. It’s more a psychological solution for people who think their computer will become faster with a small software hack. But of course you are free to believe it :-)

]]> By: Quintin Riis http://www.quintinriis.com/speed-up-application-load-time-in-ubuntu-linux-using-prelink-howto-and-benchmarks/#comment-74 Quintin Riis Wed, 18 Jun 2008 02:07:41 +0000 http://www.quintinriis.com/?p=36#comment-74 It may or may not be noticeable by a human. That isn't the point though, the point is that it <em>does</em> save time. After the initial prelink, subsequent runs are much faster, except for when the libraries are updated. I think the benefits outweigh the drawbacks though. Agree with you regarding hash-style=gnu. It may or may not be noticeable by a human. That isn’t the point though, the point is that it does save time.

After the initial prelink, subsequent runs are much faster, except for when the libraries are updated. I think the benefits outweigh the drawbacks though.

Agree with you regarding hash-style=gnu.

]]> By: Quintin Riis http://www.quintinriis.com/speed-up-application-load-time-in-ubuntu-linux-using-prelink-howto-and-benchmarks/#comment-69 Quintin Riis Mon, 16 Jun 2008 14:12:19 +0000 http://www.quintinriis.com/?p=36#comment-69 I've used preload before, but not benchmarked it. Preload runs as a daemon and records usage statistics about different files, then loads frequently accessed files into "free" or "cached" RAM, thereby reducing application startup time. I may post some benchmarks using preload in the future. Since I have a relatively large amount of RAM, I should expect it to improve performance. I’ve used preload before, but not benchmarked it.

Preload runs as a daemon and records usage statistics about different files, then loads frequently accessed files into “free” or “cached” RAM, thereby reducing application startup time.

I may post some benchmarks using preload in the future. Since I have a relatively large amount of RAM, I should expect it to improve performance.

]]> By: Quintin Riis http://www.quintinriis.com/speed-up-application-load-time-in-ubuntu-linux-using-prelink-howto-and-benchmarks/#comment-68 Quintin Riis Mon, 16 Jun 2008 14:09:39 +0000 http://www.quintinriis.com/?p=36#comment-68 This is not true. Prelink is a one time thing, once it's done, it's done. I think you are thinking of preload, which is a readahead daemon that loads frequently used programs and files into RAM. Benchmarks for it will come soon if I have a good response. This is not true. Prelink is a one time thing, once it’s done, it’s done.

I think you are thinking of preload, which is a readahead daemon that loads frequently used programs and files into RAM. Benchmarks for it will come soon if I have a good response.

]]> By: Stan http://www.quintinriis.com/speed-up-application-load-time-in-ubuntu-linux-using-prelink-howto-and-benchmarks/#comment-67 Stan Mon, 16 Jun 2008 09:03:44 +0000 http://www.quintinriis.com/?p=36#comment-67 What do you think about preload?? How different is it as compared to prelink?? What do you think about preload?? How different is it as compared to prelink??

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