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Joda posted:What is the lifetime of a stack allocated exception? Until it hits a catch that doesn't rethrow it? Implementation-defined. MSVC will copy the exception object at certain points, e.g. if you make an exception_ptr for it, but other compilers (when not targeting the MSVC ABI) will initialize a single exception object in dynamically-allocated memory. When exception_ptr was being standardized there were people trying to get the committee to declare the non-MSVC behavior non-compliant.
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Jul 23, 2019 01:23
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Absurd Alhazred posted:Sometimes that gets really counterintuitive to what you're taught in more abstract algorithm classes, however. O notation is asymptotic, which means strictly speaking, it only makes guarantees about the relation between different solutions as your problem gets larger and larger, but nothing about any particular finite problem space, or the specifics of a particular architecture. It doesn't capture that, say, the conditional and access pattern of binary search works against optimized processor behavior, so for values under a certain number of items, you're better off just using linear search. Had to optimize startup time on a processor running in initial-rom mode where the only accessible memory was the on-chip sram. sram that became d/i cache once the system was loaded and the dram initialized. During that startup phase, the SRAM was fast, the ROM was slow, and accessing the flash was glacial. It was the initial read of the flash filesystem (logfs, or maybe whatever came before that) to get the per-system parameters for the dram so we could second-stage init. But since it was logfs, you couldn't read->seek, you had to read the entire flash chip to find the newest generation of each directory in the tree and the inode of the config. It's astounding how many implementations of algorithms only count first-fetch as expensive, relying on cache for further comparisons inside the same loop. I think I ended up implementing a read-once mergesort that ran a few thousand times faster than quicksort.
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Jul 24, 2019 06:18
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SQL code:
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Jul 24, 2019 22:10
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Airbus A350 software bug forces airlines to turn planes off and on every 149 hoursquote:In a mandatory airworthiness directive (AD) reissued earlier this week, EASA urged operators to turn their A350s off and on again to prevent "partial or total loss of some avionics systems or functions".
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Jul 26, 2019 21:08
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Tangential: things I've never got: the need to have your computer on WHILE YOU'RE SLEEPING. Planes? Sure, especially the A350 which is designed to pretty much spend a vast majority of its life in the air (it's the 787 competitor, so mid to long haul flights) and pretty much go from city to city constantly.
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Jul 27, 2019 17:32
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Back when I did not have insanely fast internet, it was often simplest to just keep the PC on and let it download things overnight 
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Jul 27, 2019 17:49
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Xarn posted:Back when I did not have insanely fast internet, it was often simplest to just keep the PC on and let it download things overnight That's one thing, but I'm talking in 2019.
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Jul 27, 2019 18:31
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iospace posted:Tangential: things I've never got: the need to have your computer on WHILE YOU'RE SLEEPING. Planes? Sure, especially the A350 which is designed to pretty much spend a vast majority of its life in the air (it's the 787 competitor, so mid to long haul flights) and pretty much go from city to city constantly. On the other hand, I met a person once who was convinced that having a computer in your bedroom is bad because the RADIATION kills you in your sleep even if you turn the computer off at night.
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Jul 27, 2019 20:24
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iospace posted:Tangential: things I've never got: the need to have your computer on WHILE YOU'RE SLEEPING.
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Jul 27, 2019 21:21
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If your computer has an automatic sleep mode then why turn it off ever? It’s one less thing you have to manage.
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Jul 27, 2019 22:21
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tankadillo posted:If your computer has an automatic sleep mode then why turn it off ever? It’s one less thing you have to manage. Because sleep/hibernate frequently gently caress up and require a hard reboot. I mean, they mostly work, but I have one laptop with a dual GPU setup that won't wake up the screen about 1 out of every 10 sleeps. It's loving annoying.
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Jul 27, 2019 22:36
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tankadillo posted:If your computer has an automatic sleep mode then why turn it off ever? It’s one less thing you have to manage. I don't know about you, but I'm worried about potential power outages and irregularities, batteries burning if they're overcharged, and such, so I have everything connected through a surge protector strip, which I switch off before I go to bed/work.
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Jul 27, 2019 22:53
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Absurd Alhazred posted:batteries burning if they're overcharged Isn't that what the battery firmware is for, to ensure that they're not getting charged if they're full?
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Jul 27, 2019 22:58
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Volmarias posted:Isn't that what the battery firmware is for, to ensure that they're not getting charged if they're full? Not interested in coming back to/waking up in a flaming home as my first indication that their firmware has failed.
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Jul 27, 2019 23:06
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Arsenic Lupin posted:Look, when I wake up in the morning I don't want to wait out the minute of cold boot time. I have webs to surf, damnit. Get an SSD. This isn't snark, having an SSD is pretty nice.
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Jul 27, 2019 23:42
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tankadillo posted:If your computer has an automatic sleep mode then why turn it off ever? It’s one less thing you have to manage. If you have anything security-sensitive on your hard drive you should keep it powered off. Plus, my 2007 ThinkPad can cold boot to xfce in less time it takes for my 2018 MacBook to wake from sleep.
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Jul 27, 2019 23:51
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Absurd Alhazred posted:Not interested in coming back to/waking up in a flaming home as my first indication that their firmware has failed. It's no longer 1994 my dude. If your battery's circuitry/onboard controller is in such a broken state that this can happen, it's already liable to incinerate itself while not plugged into the wall.
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Jul 28, 2019 00:43
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Firmware and operating systems could and should be written to handle being run continuously and being restarted continuously equally without complaint. (no i don't work with embedded systems why do you ask??)
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Jul 28, 2019 01:03
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Hammerite posted:Get an SSD. This isn't snark, having an SSD is pretty nice.
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Jul 28, 2019 01:20
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Arsenic Lupin posted:Ah, but I pay the Apple tax for guaranteed non-upgradability. well then get a real computer these are all problems that you can solve
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Jul 28, 2019 01:29
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Doc Hawkins posted:Firmware and operating systems could and should be written to handle being run continuously and being restarted continuously equally without complaint. 
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Jul 28, 2019 01:29
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iospace posted:Tangential: things I've never got: the need to have your computer on WHILE YOU'RE SLEEPING. Planes? Sure, especially the A350 which is designed to pretty much spend a vast majority of its life in the air (it's the 787 competitor, so mid to long haul flights) and pretty much go from city to city constantly. Those torrents ain't gonna seed themselves
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Jul 28, 2019 03:31
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I don't turn off my computer at night because I used to have reasons not to and now I don't really see a reason to start?
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Jul 28, 2019 03:59
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I turn everything off just for the peace of mind. No LEDs blinking at night, no fans whirring, no power surges, no IMs left in the background and all the updates run when they're supposed to. Cold boot times haven't been an issue since SSDs were invented.
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Jul 28, 2019 04:52
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https://twitter.com/voxel/status/1155349276509163520
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Jul 28, 2019 07:53
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Phobeste posted:My guy we're on a dead comedy forum you can lose the cut-rate William F. Buckley act Ballsy way to say "oops I was wrong"
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Jul 28, 2019 11:50
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Some people shutdown their computers other people don't. The important question is why would anyone give a poo poo what other people do either way?
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Jul 28, 2019 11:53
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a hot gujju bhabhi posted:Some people shutdown their computers other people don't. The important question is why would anyone give a poo poo what other people do either way? Leaving your PC on at night is the "standing up to wipe your arse" of the computer world.
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Jul 28, 2019 11:55
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I almost never power off my laptop even though I should, due to the coding horror that is my Lenovo drivers and Windows trying to work together. 1 in 10 times it won't wake up from sleep, holding the power button to reset it also resets some system settings.
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Jul 28, 2019 13:13
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I put my computer to sleep at night when I remember to. I did not remember to last night.
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Jul 28, 2019 13:30
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The paint has scraped off of the power button, exposing an LED with the intensity of the sun to my bedroom wall. I turn off my computer so that I can sleep, because I don't want to do something as simple as cover it with dark tape.
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Jul 28, 2019 14:45
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SupSuper posted:Cold boot times haven't been an issue since SSDs were invented. I have a pretty decent system with a pretty good SATA SSD (Samsung 860 Pro), and yeah sure the system boots in like 10 seconds. But then it's several minutes of my IDE's loading, my 20+ little apps that make my computing a little easier loading into my system tray, arranging my windows and tabs how I like them...all while dealing with the slowdowns caused by all this stuff loading on boot. (Though Autorun Organizer has made it much better than it used to be...it can stagger the startup of all these little apps I use) On the one hand, it's only several minutes a day. On the other hand, it costs me a few bucks a month in electricity to save myself several minutes a day.
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Jul 28, 2019 17:09
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Since I bought my own house and therefore I started paying my own electricity bill, I turn off whatever doesn't need to be on. It's a few $. It's my few $.
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Jul 28, 2019 17:12
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Volmarias posted:The paint has scraped off of the power button, exposing an LED with the intensity of the sun to my bedroom wall. I turn off my computer so that I can sleep, because I don't want to do something as simple as cover it with dark tape. You could just unplug the LED from the motherboard, leaving it dangling doesn't affect anything. Same for the HDD LED.
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Jul 28, 2019 17:17
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Volguus posted:Since I bought my own house and therefore I started paying my own electricity bill, I turn off whatever doesn't need to be on. It's a few $. It's my few $. Unless you're unplugging the wall wart, you aren't saving power.
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Jul 28, 2019 17:34
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I keep my computer on so I can play this noise and not have to listen to the ruckus outside while I sleep https://mynoise.net/NoiseMachines/campingRainNoiseGenerator.php?l=35355555617474625535&m=&d=0
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Jul 28, 2019 17:52
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Arsenic Lupin posted:Unless you're unplugging the wall wart, you aren't saving power. Come again? This time with some data/conditions backing up your claim?
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Jul 28, 2019 18:04
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"Aren't saving power" is inaccurate; my apology. "Are still consuming substantial power" is true. See here for one discussion.
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Jul 28, 2019 18:13
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Arsenic Lupin posted:"Aren't saving power" is inaccurate; my apology. "Are still consuming substantial power" is true. See here for one discussion. My computer consumes about 200 watts when it is turned on (peaking at much more, of course). How much does it consume when it's off?
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Jul 28, 2019 18:21
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Arsenic Lupin posted:"Aren't saving power" is inaccurate; my apology. "Are still consuming substantial power" is true. See here for one discussion. This is false as well. From the article: quote:While adapters consume a modest amount of energy individually, the drain on power adds up. Not to mention, this article is referring to power adapters, chargers and the like. I have a plain computer. Now, while I'm sure that the "off" consumption is not zero, it still cannot be at the 94W this article says that my CPU is consuming while idle. Of course, until proven wrong. If you can find an article out there that measured the wall consumption while the computer is off and found it to be near the consumption while being on (but idle), I will gladly concede.
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Jul 28, 2019 18:32
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