April 2025
Intermediate to advanced
450 pages
14h 46m
Italian
Content preview from Prestazioni Java, 2a edizione
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Capitolo 4. Lavorare con il compilatore JIT
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Il compilatore just-in-time (JIT) è il cuore della Java Virtual Machine; niente controlla le prestazioni della tua applicazione più del compilatore JIT.
Questo capitolo tratta in modo approfondito il compilatore. Inizia con informazioni sul funzionamento del compilatore e discute i vantaggi e gli svantaggi dell'utilizzo di un compilatore JIT. Fino all'arrivo del JDK 8, dovevi scegliere tra due compilatori Java. Oggi, questi due compilatori esistono ancora ma lavorano in concerto tra loro, anche se in rari casi è necessario sceglierne uno. Infine, esamineremo alcune regolazioni intermedie e avanzate del compilatore. Se un'applicazione funziona lentamente senza un motivo evidente, queste sezioni possono aiutarti a capire se il problema è il compilatore.
Compilatori Just-in-Time: Una panoramica
Inizieremo con un po' di materiale introduttivo; sentiti libero di andare avanti se conosci le basi della compilazione just-in-time.
I computer, e più precisamente le CPU, possono eseguire solo un numero relativamente limitato di istruzioni specifiche, chiamate codice macchina. Tutti i programmi che la CPU esegue devono quindi essere tradotti in queste istruzioni.
Linguaggi come il C++ e il Fortran sono chiamati linguaggi compilati perché i loro programmi vengono forniti come codice binario (compilato): il programma ...
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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.