caching

问题 When designing java classes, what are the recommendations for achieving CPU cache friendliness? What I have learned so far is that one should use POD as much as possible (i.e. int instead of integer). Thus, the data will be allocated consecutively when allocating the containing object. E.g. class Local { private int data0; private int data1; // ... }; is more cache friendly than class NoSoLocal { private Integer data0; private Integer data1; //... }; The latter will require two separate

问题 When designing java classes, what are the recommendations for achieving CPU cache friendliness? What I have learned so far is that one should use POD as much as possible (i.e. int instead of integer). Thus, the data will be allocated consecutively when allocating the containing object. E.g. class Local { private int data0; private int data1; // ... }; is more cache friendly than class NoSoLocal { private Integer data0; private Integer data1; //... }; The latter will require two separate

问题 I am new to caching. From the docs, I can use caching with queries, but what about methods like $em->find('Application\Models\project', 1); 回答1: If you search for an automatism, i think the awnser is no, their is no such thing. I was searching for something like this my self. You can wrap find(...) in a method of a service class, getProjectById($id) and do caching inside this method your self. But then you need a save() method too, to clear-cache for specific id after flushing. 回答2: As

问题 I have a list of items in database and each item has option to be voted down or up. Those votes are stored in MySql along with other item fields. For example someting like this: Schema::create('items', function ($table) { $table->increments('id'); $table->text('message'); $table->integer('up_votes')->unsigned()->default(0); $table->integer('down_votes')->unsigned()->default(0); $table->timestamps(); }); User can vote down/up every day. When user decides to vote I store his decision to

问题 I have a list of items in database and each item has option to be voted down or up. Those votes are stored in MySql along with other item fields. For example someting like this: Schema::create('items', function ($table) { $table->increments('id'); $table->text('message'); $table->integer('up_votes')->unsigned()->default(0); $table->integer('down_votes')->unsigned()->default(0); $table->timestamps(); }); User can vote down/up every day. When user decides to vote I store his decision to

问题 I have a list of items in database and each item has option to be voted down or up. Those votes are stored in MySql along with other item fields. For example someting like this: Schema::create('items', function ($table) { $table->increments('id'); $table->text('message'); $table->integer('up_votes')->unsigned()->default(0); $table->integer('down_votes')->unsigned()->default(0); $table->timestamps(); }); User can vote down/up every day. When user decides to vote I store his decision to

问题 I'm making an Android application that, among other things, shows websites in a webview. As far as I understand, the webview automatically shows a cached version of the page if a connection can't be established. Is there any way to find out if the page shown has been fetched from the server or cache? Maybe even how old the cached page is. This is to be able to notify the user if he/she is viewing old information. 回答1: You could try a hack - at first set WebView's cache mode to WebSettings.NO

问题 I'm making an Android application that, among other things, shows websites in a webview. As far as I understand, the webview automatically shows a cached version of the page if a connection can't be established. Is there any way to find out if the page shown has been fetched from the server or cache? Maybe even how old the cached page is. This is to be able to notify the user if he/she is viewing old information. 回答1: You could try a hack - at first set WebView's cache mode to WebSettings.NO

问题 When my app loads, I pull down a JSON representation of 99 objects. Each object has an 'image_url' field, which I pass to AFNetworking's setImageWithURLRequest . My images load in a tableView, and consequently, only the first several cells make requests for their images. It's not until I scroll down that subsequent image requests are made. Once I pull down the initial dataset, I'd like to be able to kick off a background process that goes out and downloads the 95 or so objects that aren't

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 2 years ago . I know you can go to http://webcache.googleusercontent.com/search?q=cache:http://example.com/ to view Google's cache of any URL, but do they provide an API to hit thousands of these and pay for access? I don't want to just make HTTP GETs to these URLs too fast and get my IP addresses banned or upset Google. Just