September 2024
Intermediate to advanced
440 pages
12h 18m
Spanish
Content preview from Optimizar Java
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Capítulo 2. Visión general de la JVM
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No cabe duda de que Java es una de las mayores plataformas tecnológicas del planeta, con unos 9-10 millones de desarrolladores (según Oracle). Por diseño, muchos desarrolladores no necesitan conocer los entresijos de bajo nivel de la plataforma con la que trabajan.Esto lleva a una situación en la que los desarrolladores sólo conocen estos aspectos cuando un cliente se queja por primera vez del rendimiento.
Sin embargo, para los desarrolladores interesados en el rendimiento, es importante comprender los fundamentos de la pila tecnológica JVM. Comprender la tecnología JVM permite a los desarrolladores escribir mejor el software y proporciona la base teórica necesaria para investigar los problemas relacionados con el rendimiento.
Este capítulo presenta cómo ejecuta Java la JVM con el fin de proporcionar una base para una exploración más profunda de estos temas más adelante en el libro. En particular, el Capítulo 9 trata en profundidad el código de bytes. Una estrategia para el lector podría ser leer este capítulo ahora, y luego releerlo junto con el Capítulo 9, una vez que se hayan comprendido algunos de los otros temas.
Interpretación y carga de clases
Según la especificación que define la Máquina Virtual Java (normalmente denominada VM Spec), la JVM es una máquina interpretada basada en la pila. Esto significa que, en lugar de ...
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