September 2024
Intermediate to advanced
440 pages
12h 18m
Spanish
Content preview from Optimizar Java
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Capítulo 5. Microcomprobación y estadísticas
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En este capítulo, consideraremos los aspectos específicos de la medición directa de los números de rendimiento de Java. La naturaleza dinámica de la JVM significa que los números de rendimiento son a menudo más difíciles de manejar de lo que muchos desarrolladores esperan. Como resultado, hay muchos números de rendimiento inexactos o engañosos flotando por Internet.
Un objetivo primordial de este capítulo es asegurarte de que eres consciente de estos posibles escollos y de que sólo produces cifras de rendimiento en las que tú y los demás podéis confiar. En particular, la medición de pequeños fragmentos de código Java(microbenchmarking) es notoriamente sutil y difícil de hacer correctamente, y este tema y su uso adecuado por parte de los ingenieros de rendimiento es un tema importante a lo largo de todo el capítulo.
El primer principio es que no debes engañarte a ti mismo, y tú eres la persona más fácil de engañar.
Richard Feynman
La segunda parte del capítulo describe cómo utilizar el patrón oro de las herramientas de microcomprobación: JMH. Si, incluso después de todas las advertencias y advertencias, realmente crees que tu aplicación y tus casos de uso justifican el uso de microcomparaciones, entonces evitarás numerosos escollos conocidos y "trampas para osos" empezando con la más fiable y avanzada de las herramientas ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.