php - exporting large files in separate sheets Laravel Maatwebsite -


i have 50,000 raw. want export them system fails export it. using code. there better solution this? 

excel::create('catalogdumptreport', function ($excel) use ($finalarray) {         $excel->sheet('catalogdumptreport', function ($sheet) use ($finalarray) {             $sheet->fromarray($finalarray);             $sheet->setfontfamily('verdana');             $sheet->setfontsize(10);             $sheet->row(1, function ($row) {                 $row->setfontweight('bold');             });             $sheet->setborder('a1', 'thin');             $sheet->setheight(1, 20);         });      })->export('xls')         ->download('xls');

personally, advise against expoting such large xls files (directly in browser). best way (and fastest) export in background (such async laravel queue etc.).

there 2 computational complexity problem:

  1. time complexity - grows fast means time download in example severely hrows too.
  2. complexity of memory - can exhaust memory resources on machine can exhaust memory resources on machine fast - means not current system/program can act every other lunched on machine.

as said best way put xle generating in background - there's more:

you need find way split data , append portions of data - not @ once. can save memory resources.

after export in queue can check in browser through ajax request if file ready download , let user dowload prepared xls file.


-

Popular posts from this blog

php - How should I create my API for mobile applications (Needs Authentication) -

background so i've been researching quite bit past week api's , have been reading concepts , programming one. currently have website programmed in php using popular framework called laravel. website has user database , users able log dashboard on website, works want website side. now next project of business i'm focusing on creating mobile applications (ios & andriod).what need these mobile applications being able login through application ui (not being redirected site callback url) able view , manage dashboard. the method of authentication , authorization want use application go like client asks user login through ui user enters credentials client sends request login api the api checks if credentials correct api creates token stored in token database linked user id api returns 200 ok json response or this { "token" : "ols25usjiay81hdy81", "expiry" : 3/06/2016 14:00} client remembers token , expiry whenever user/c...
Read more

python 3.x - PyQt5 - Signal : pyqtSignal no method connect -

following example in doc found on sourceforge faced error. from pyqt5.qtcore import pyqtsignal, pyqtslot def setsignal(): signal = pyqtsignal() signal.connect(self.myaction) @qtcore.pyqtslot() def myaction(): print("signal triggered") results in attributeerror: 'pyqt5.qtcore.pyqtsignal' object has no attribute 'connect' as mentioned in docs linked, signal needs defined on class level: class foo(qobject): signal = pyqtsignal() def connectsignal(): self.signal.connect(self.myaction) @qtcore.pyqtslot() def myaction(): print("signal triggered")
Read more

5 Reasons to Blog Anonymously (and 5 Reasons Not To)

Image
This guest post is by Phil (not his real name) of somehighschoolblog . It used to be impossible to run a business anonymously. Sure, some authors could pull it off, but if you worked at an office, what were you supposed to do? Go to work with a bag over your head? But today anyone can accomplish this, because anyone can author a blog (and you thought I was going to tell you to work with a mask on, or something). Copyright Ovidiu Iordachi - Fotolia.com Depending on your motives, you may or may not have considered blogging anonymously. You probably didn’t contemplate blogging anonymously if: • your only motivation is to become “famous” • your blog connects to another part of your life • you are blogging to build more connections with your friends or boss. You should consider blogging anonymously if: • you’re planning on touching on a sensitive or taboo subject • you don’t want to be identified with your blog • you are worried about negative real-world consequences that could arise from y...
Read more