Return-Path: Delivered-To: diana@transocean.com Received: from vps.transocean.com by vps.transocean.com (Dovecot) with LMTP id +eR/ORxfWVgkegAAInt2oQ for ; Tue, 20 Dec 2016 08:41:00 -0800 Return-path: Envelope-to: diana@transocean.com Delivery-date: Tue, 20 Dec 2016 08:41:00 -0800 Received: from [38.114.100.3] (port=52964 helo=pecovac.com) by vps.transocean.com with esmtp (Exim 4.87) (envelope-from ) id 1cJNT7-000875-A9 for diana@transocean.com; Tue, 20 Dec 2016 08:41:00 -0800 Date: Tue, 20 Dec 2016 11:35:32 -0500 To: KIK-TechID: 8811-11122.15169264.JUD.000110011 Reply-To: "Katelyn Haynes" Content-Type: multipart/alternative; boundary="oG7535367880efcab8c324536e0c838e3bre" Subject: Can you use 50.00 last minute shopping money at Sam's Club? Mime-Version: 1 Message-Id: From: "Katelyn Haynes" X-Spam-Status: No, score=2.0 X-Spam-Score: 20 X-Spam-Bar: ++ X-Ham-Report: Spam detection software, running on the system "vps.transocean.com", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see root\@localhost for details. Content preview: Written like this, the function took ~34ms on my machine. After changing the condition to bool multiplication (making the code look like this): double CompareShifted(const std::vector &curr, int shift, int shiftY) { ... for(std::size_t i=std::max(0,-shift); ... } ... } the execution time decreased to ~19ms. The compiler used was GCC 5.4.0 with -O3 and after checking the generated asm code using godbolt.org I found out that the first example generates a jump, while the second one does not. I decided to try GCC 6.2.0 which also generates a jump instruction when using the first example, but GCC 7 seems to not generate one anymore. Finding out this way to speed up the code was rather gruesome and took quite some time. Why does the compiler behave this way? Is it intended and is it something the programmers should look out for? Are there any more things similar to this? EDIT: link to godbolt https://godbolt.org/g/5lKPF3 [...] Content analysis details: (2.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [URIs: samsclub.com] 0.0 T_SPF_TEMPERROR SPF: test of record failed (temperror) -0.0 SPF_HELO_PASS SPF: HELO matches SPF record 0.0 HTML_MESSAGE BODY: HTML included in message -0.0 BAYES_40 BODY: Bayes spam probability is 20 to 40% [score: 0.3640] 2.0 RDNS_NONE Delivered to internal network by a host with no rDNS 0.0 T_REMOTE_IMAGE Message contains an external image X-Spam-Flag: NO --oG7535367880efcab8c324536e0c838e3bre Content-type: text/plain; charset=UTF-8 Content-transfer-encoding: 8bit Written like this, the function took ~34ms on my machine. After changing the condition to bool multiplication (making the code look like this): double CompareShifted(const std::vector &curr, int shift, int shiftY) { ... for(std::size_t i=std::max(0,-shift); ... } ... } the execution time decreased to ~19ms. The compiler used was GCC 5.4.0 with -O3 and after checking the generated asm code using godbolt.org I found out that the first example generates a jump, while the second one does not. I decided to try GCC 6.2.0 which also generates a jump instruction when using the first example, but GCC 7 seems to not generate one anymore. Finding out this way to speed up the code was rather gruesome and took quite some time. Why does the compiler behave this way? Is it intended and is it something the programmers should look out for? Are there any more things similar to this? EDIT: link to godbolt https://godbolt.org/g/5lKPF3 I am not there to spray them with anything.. I live 700 miles away. Like Show 0 Likes (0) Actions Re: Bear damage bobbie32 Community All-Star bobbie32 Aug 19, 2016 10:44 AM (in response to u0999) Have your cleaners spray the cans on the outside - the odor stays for some time. Like Show 0 Likes (0) Actions Re: Bear damage kdhbreeze Senior Contributor kdhbreeze Aug 19, 2016 11:15 AM (in response to bobbie32) Our cleaners spray the insides with disinfectant and the outside with a deterrent, though we only really have issues with raccoons. Like Show 0 Likes (0) Actions Re: Bear damage The first and last * are interpreted as unary but the second * is interpreted as binary. From a syntax perspective, this looks OK. It is only after parsing when the compiler tries to interpret the operators in the context of their operand types that an error is seen. Sam's Club Shopper Rewards Happy Holidays Wholesale Shopper! Last step: To become entered to receive a $200 Sam's Club card to use on any items, please ley us know your opinion. Does Sam's Club Meet your Expectations? Begin Here ???????? (http://www.pecovac.com/sams-n/space/index/) http://www.pecovac.com/club/yup_cgi/ http://bg.pecovac.com --oG7535367880efcab8c324536e0c838e3bre Content-Type: text/html; charset=UTF-8 Content-transfer-encoding: 8bit samsclub.com
Written like this, the function took ~34ms on my machine. After changing the condition to bool multiplication (making the code look like this): double CompareShifted(const std::vector &curr, int shift, int shiftY) { ... for(std::size_t i=std::max(0,-shift); ... } ... } the execution time decreased to ~19ms. The compiler used was GCC 5.4.0 with -O3 and after checking the generated asm code using godbolt.org I found out that the first example generates a jump, while the second one does not. I decided to try GCC 6.2.0 which also generates a jump instruction when using the first example, but GCC 7 seems to not generate one anymore. Finding out this way to speed up the code was rather gruesome and took quite some time. Why does the compiler behave this way? Is it intended and is it something the programmers should look out for? Are there any more things similar to this? EDIT: link to godbolt https://godbolt.org/g/5lKPF3
I am not there to spray them with anything.. I live 700 miles away. Like Show 0 Likes (0) Actions Re: Bear damage bobbie32 Community All-Star bobbie32 Aug 19, 2016 10:44 AM (in response to u0999) Have your cleaners spray the cans on the outside - the odor stays for some time. Like Show 0 Likes (0) Actions
Re: Bear damage kdhbreeze Senior Contributor kdhbreeze Aug 19, 2016 11:15 AM (in response to bobbie32) Our cleaners spray the insides with disinfectant and the outside with a deterrent, though we only really have issues with raccoons. Like Show 0 Likes (0) Actions Re: Bear damage
The first and last * are interpreted as unary but the second * is interpreted as binary. From a syntax perspective, this looks OK. It is only after parsing when the compiler tries to interpret the operators in the context of their operand types that an error is seen.
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