performance

问题 I read High Performance Web Sites: Essential Knowledge for Front-End Engineers and in it the author suggests that all JavaScript code should be externalized and put at the bottom of the page instead of putting it in the head. This is illustrated in this example. The external script tag blocks both downloading and progressive rendering of a page, so the solution was to put it at the bottom of the page. However, in his second book Even Faster Web Sites: Performance Best Practices for Web

问题 I have a project in which I'll have to process 100s if not 1000s of messages a second and process/plot this data on graphs accordingly (The user will search for a set of data in which the graph will be plotted in real time, not literally having to plot 1000s of values on a graph). I'm having trouble understanding using dlls for having the bulk of the message processing in C++ but then handing the information into a C# interface. Can someone dumb it down for me here? Also, as speed will be a

问题 I have a project in which I'll have to process 100s if not 1000s of messages a second and process/plot this data on graphs accordingly (The user will search for a set of data in which the graph will be plotted in real time, not literally having to plot 1000s of values on a graph). I'm having trouble understanding using dlls for having the bulk of the message processing in C++ but then handing the information into a C# interface. Can someone dumb it down for me here? Also, as speed will be a

问题 I have a project in which I'll have to process 100s if not 1000s of messages a second and process/plot this data on graphs accordingly (The user will search for a set of data in which the graph will be plotted in real time, not literally having to plot 1000s of values on a graph). I'm having trouble understanding using dlls for having the bulk of the message processing in C++ but then handing the information into a C# interface. Can someone dumb it down for me here? Also, as speed will be a

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . Improve this question What I think I'm looking for is a no-SQL, library-embedded, on disk (ie not in-memory) database, thats accessible from java (and preferably runs inside my instance of the JVM). That's not really much of a database, and I'm tempted to roll-my-own. Basically I'm

问题 Is it possible to cache docker images on Travis CI? Attempting to cache the /var/lib/docker/aufs/diff folder and /var/lib/docker/repositories-aufs file with cache.directories in the travis.yml doesn't seem to work since they require root. 回答1: From a Docker perspective, I think the best way you could do this (without the possibility of running a network local registry) is save the Docker image and cache the exported tar ball. You would need to load that at the start rather than pull an image.

问题 Is it possible to cache docker images on Travis CI? Attempting to cache the /var/lib/docker/aufs/diff folder and /var/lib/docker/repositories-aufs file with cache.directories in the travis.yml doesn't seem to work since they require root. 回答1: From a Docker perspective, I think the best way you could do this (without the possibility of running a network local registry) is save the Docker image and cache the exported tar ball. You would need to load that at the start rather than pull an image.

问题 Is it possible to cache docker images on Travis CI? Attempting to cache the /var/lib/docker/aufs/diff folder and /var/lib/docker/repositories-aufs file with cache.directories in the travis.yml doesn't seem to work since they require root. 回答1: From a Docker perspective, I think the best way you could do this (without the possibility of running a network local registry) is save the Docker image and cache the exported tar ball. You would need to load that at the start rather than pull an image.

问题 During working on sockets and serializing objects over them, I noticed that there are some 3rd party libraries for faster object serialization on Java such as Kryo and FST. Up to now, I expected that Java's serialization is optimized and the fastest. Because, it is language dependent and gives a low level solution that is expected to be faster. However, the considered libraries claim that they are faster than Java. Can someone explain why Java could not provide the fastest serialization

问题 During working on sockets and serializing objects over them, I noticed that there are some 3rd party libraries for faster object serialization on Java such as Kryo and FST. Up to now, I expected that Java's serialization is optimized and the fastest. Because, it is language dependent and gives a low level solution that is expected to be faster. However, the considered libraries claim that they are faster than Java. Can someone explain why Java could not provide the fastest serialization