The static middleware does no server-side caching. It lets you do two methods of client-side caching: ETag and Max-Age: If the browser sees the ETag with the page, it will cache it. The next time the browser loads the page it checks for the ETag number changes. If the file is exactly the same, and … Read more
Allocate a BIG char array (make sure it is too big to fit in L1 or L2 cache). Fill it with random data. Start walking over the array in steps of n bytes. Do something with the retrieved bytes, like summing them. Benchmark and calculate how many bytes/second you can process with different values of … Read more
Part 1: Hibernate does the right thing. The query cache is not per entity. There is a single query cache region, shared by all queries, unless you set a specific region for a query. Each time a table is updated, its timestamp in the timestamps cache is updated. Each time a query is executed, the … Read more
google collections actually supplies just the thing for just this sort of thing: Supplier Your code would be something like: private Supplier<List<String>> supplier = new Supplier<List<String>>(){ public List<String> get(){ return loadCountryList(); } }; // volatile reference so that changes are published correctly see invalidate() private volatile Supplier<List<String>> memorized = Suppliers.memoize(supplier); public List<String> list(){ return memorized.get(); … Read more
For RedisCache you can get all available keys with. from django.core.cache import cache cache.keys(‘*’)
I think, you should check the MACHINE_CLEARS.SMC performance counter (part of MACHINE_CLEARS event) of the CPU (it is available in Sandy Bridge 1, which is used in your Air powerbook; and also available on your Xeon, which is Nehalem 2 – search “smc”). You can use oprofile, perf or Intel’s Vtune to find its value: … Read more
A build-time argument can be specified to forcibly break the cache from that step onwards. For example, in your Dockerfile, put ARG CACHE_DATE=not_a_date and then give this argument a fresh value on every new build. The best, of course, is the timestamp. docker build –build-arg CACHE_DATE=$(date +%Y-%m-%d:%H:%M:%S) … Make sure the value is a string … Read more
There are two costs to a virtual function call: The vtable lookup and the function call. The vtable lookup is already taken care of by the hardware. Modern CPUs (assuming you’re not working on a very simple embedded CPU) will predict the address of the virtual function in their branch predictor and speculatively execute it … Read more
I had the exactly same problem and spent a couple of hours… I guess you are using older version of nginx (lower than 1.7)? In nginx 1.7 you can use this directive: proxy_ssl_server_name on; This will force nginx to use SNI Also, you should set the SSL protocols: proxy_ssl_protocols TLSv1 TLSv1.1 TLSv1.2; For earlier versions … Read more