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java Programming Glossary: costlyalternative to memcached that can persist to disk http://stackoverflow.com/questions/1316852/alternative-to-memcached-that-can-persist-to-disk we define a weight for cache items that represents how costly it is to rebuild an item if it cannot be retrieved from cache... we go for memcached and only if it's not there and it is a costly object then we check the disk cache which is by magnitudes slower..
Performance ConcurrentHashmap vs HashMap http://stackoverflow.com/questions/1378310/performance-concurrenthashmap-vs-hashmap operations which implies a memory barrier potentially very costly and interfering with other possible optimisations . Even if..
http://stackoverflow.com/questions/155243/why-is-it-impossible-without-attempting-i-o-to-detect-that-tcp-socket-was-grac status information Or is it a design decision to avoid a costly call into the kernel With the help of the users who have already..
Why did java have the reputation of being slow? [closed] http://stackoverflow.com/questions/2163411/why-did-java-have-the-reputation-of-being-slow
Am I using Java PooledConnections correctly? http://stackoverflow.com/questions/2353569/am-i-using-java-pooledconnections-correctly I want to use pooled connections with Java because it is costly to create one connection per thread so I'm using the MysqlConnectionPoolDataSource..
What is the memory consumption of an object in Java? http://stackoverflow.com/questions/258120/what-is-the-memory-consumption-of-an-object-in-java on the container used For instance Wrappers can be costly too compared to primitive type for attributes Integer The 16.. alignment on an 8 byte word boundary. Other containers are costly too Multidimensional arrays it offers another surprise. Developers..
Difference between double… and double[] in formal parameter type declaration http://stackoverflow.com/questions/2888305/difference-between-double-and-double-in-formal-parameter-type-declaration values . Not only can varargs be confusing it can also be costly. Effective Java 2nd Edition actually recommends providing fixed..
Why does autoboxing in Java allow me to have 3 possible values for a boolean? http://stackoverflow.com/questions/2923249/why-does-autoboxing-in-java-allow-me-to-have-3-possible-values-for-a-boolean when your program boxes primitive values it can result in costly and unnecessary object creations. share improve this answer..
Why does int num = Integer.getInteger(“123”) throw NullPointerException? http://stackoverflow.com/questions/3123349/why-does-int-num-integer-getinteger123-throw-nullpointerexception when your program boxes primitive values it can result in costly and unnecessary object creations. There are places where you..
Why comparing Integer with int can throw NullPointerException in Java? http://stackoverflow.com/questions/3352791/why-comparing-integer-with-int-can-throw-nullpointerexception-in-java when your program boxes primitive values it can result in costly and unnecessary object creations. There are places where you..
http://stackoverflow.com/questions/4181941/loop-counter-in-java-api any slight performance gain I think it's because it's less costly to compare with 0 then to compare with other values. So I guess..
If profiler is not the answer, what other choices do we have? http://stackoverflow.com/questions/4387895/if-profiler-is-not-the-answer-what-other-choices-do-we-have point shows up on 2 of them it is highly likely to be very costly. Specifically it follows a beta distribution. If you generate..
In Java, what is the advantage of using BufferedWriter to append to a file? http://stackoverflow.com/questions/6976893/in-java-what-is-the-advantage-of-using-bufferedwriter-to-append-to-a-file around any Writer whose write operations may be costly such as FileWriters and OutputStreamWriters. For example PrintWriter..
Know if a file is a image in Java/Android http://stackoverflow.com/questions/9244710/know-if-a-file-is-a-image-in-java-android to read the file using the ImageIO class but that can be costly and is not entirely foolproof. BufferedImage image ImageIO.read..
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