caching

问题 I am not sure, but if i remember right intel uses a VIPT cache, i would like to know the reason of this choice, why is it better than VIVT or PIPT, what advantages does it procure and maybe what disadvantages. Thank you. 回答1: The exact design decisions are probably not published, but in general the benefits for VIPT are : Virtual indexing means you can start reading the set from the cache before (or in parallel with) looking up the translation in the TLB. This means that the common case

问题 I am looking for a way to trigger the same behavior as "Clear site data" in Chrome Dev tools or as close to the same behavior as possible. I know there are some things that are not possible i.e. clearing browser cache, and this doesn't need to be within the scope of this question. I am not sure if Clear Site Data does some special things other than clearing cookies, Web SQL/IndexedDB and unregistering service workers. I use localForage in some of the projects I work on so cleaning IndexedDB

问题 We use github to manage a great deal of our software environment, and I would wager that like many other orgs the overwhelming majority of traffic to/from that repo comes from our office. With that in mind, is there a way to build a local cache of a given github repository, but still have the protection of the cloud version? I'm thinking of this in the model of a caching proxy server, where the local server (presumably in our building, on our local network) would handle the vast majority of

问题 I am on an dead end with redis cache. I want to set an TTL on the initiation of a key. The key will be set by hSet($hash, $key, $data) expire($key, '3600') does not seem to work. Is there an hExpire() method? 回答1: Explanation: Redis supports expiration only on KEY level. It does not support expiration on inner element(s) of any data structure, let alone hash. Answer: No. There is no hExpire method/command in Redis. You're trying expire an inner element in a hash. This is not possible in Redis

问题 I am on an dead end with redis cache. I want to set an TTL on the initiation of a key. The key will be set by hSet($hash, $key, $data) expire($key, '3600') does not seem to work. Is there an hExpire() method? 回答1: Explanation: Redis supports expiration only on KEY level. It does not support expiration on inner element(s) of any data structure, let alone hash. Answer: No. There is no hExpire method/command in Redis. You're trying expire an inner element in a hash. This is not possible in Redis

问题 Is there a way to check if a resource is cached by the browser without downloading the resource? Most of the questions and answers are old and I believe things have changed now and there are better ways. 回答1: You can leverage the fetch API and it's correspondent AbortController to achieve this functionality with a margin of error (expected false negatives). It goes like this, fetch the required resource with a signal attached. Abort in a small amount of time eg. 4ms. If the fetch is returned

问题 example from : SpringSource @Cacheable(value = "vets") public Collection<Vet> findVets() throws DataAccessException { return vetRepository.findAll(); } How does findVets() work exactly ? For the first time, it takes the data from vetRepository and saves the result in cache. But what happens if a new vet is inserted in the database - does the cache update (out of the box behavior) ? If not, can we configure it to update ? EDIT: But what happens if the DB is updated from an external source (e.g

问题 I am running into a known AppEngine issue where the wrong static content is cached if I go to a particular URL for my app, but the right static content shows up if I append a ?foo parameter to bust the cache, and VERSION.myapp.appspot.com works too. Is there any way to get the correct content showing up at the unmodified URL? I would be happy to delete the app and restore it or anything drastic. The app isn't live, but I need it to be in a couple of hours. Anything to get those URLS working

问题 I have a function that returns a list, say list_x. def result(val): .. return(list_x) I am calling result() every minute and storing the list. def other_func(): #called every minute new_list = result(val) I would like to store the value of new_list for an hour (in some sort of in-memory cache may be?) and then update it again, basically call results() after an hour and not every minute.I read about functools.lru_cache but that will not help here I think. Any ideas? 回答1: Building a single

问题 I'm writing an app which stores images in Google Drive and I'd like to display a gallery of those ( GridView ). To be more performant (i.e. async) I'd like to integrate this with Picasso . But the Picasso.load(String) is just an alias to load(Uri.parse(path)) , and I don't have a Uri because the images are loaded like this (simplified and with undisclosed utility methods): public static Bitmap getBitmap(DriveId id) { GoogleApiClient client = ApiClientAsyncTask.createConnectedClient(App