{"id":55147,"date":"2020-01-13T00:00:00","date_gmt":"2020-01-12T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/pervyj-vypusk-wasm3-bystrogo-interpretatora-webassembly"},"modified":"2020-02-18T14:03:13","modified_gmt":"2020-02-18T11:03:13","slug":"pervyj-vypusk-wasm3-bystrogo-interpretatora-webassembly","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/pervyj-vypusk-wasm3-bystrogo-interpretatora-webassembly","title":{"rendered":"Primo rilascio di wasm3, un veloce interprete WebAssembly","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/wasm3\/wasm3\/releases\">Disponibile<\/a><\/noindex> il primo rilascio <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/wasm3\/wasm3\">wasm3<\/a><\/noindex>, un interprete molto veloce per il codice intermedio WebAssembly, progettato principalmente per eseguire applicazioni WebAssembly su microcontrollori e piattaforme che non hanno una implementazione JIT di WebAssembly, hanno memoria insufficiente per il funzionamento del JIT o non consentono la creazione di pagine di memoria eseguibili necessarie per implementare il JIT. Il codice del progetto \u00e8 scritto in C e <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/wasm3\/wasm3\">distribuito<\/a><\/noindex> sotto licenza MIT.<\/p>\n<p>Wasm3 garantisce <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/WebAssembly\/spec\/tree\/master\/test\/core\">test<\/a><\/noindex> la compatibilit\u00e0 con la specifica WebAssembly 1.0 e pu\u00f2 essere utilizzato per eseguire molte applicazioni WASI, offrendo prestazioni solo 4-5 volte inferiori ai motori JIT (<noindex><a rel=\"nofollow\" href=\"https:\/\/v8.dev\/blog\/liftoff\">liftoff<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/bytecodealliance\/cranelift\">cranelift<\/a><\/noindex>) e 11.5 volte inferiori all'esecuzione di codice nativo. Rispetto ad altri interpreti WebAssembly (<noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/kanaka\/wac\">wac<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/perlin-network\/life\">life<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/bytecodealliance\/wasm-micro-runtime\">wasm-micro-runtime<\/a><\/noindex>), wasm3 si \u00e8 rivelato pi\u00f9 veloce di 15.8 volte.<\/p>\n<p>Per funzionare, wasm3 richiede 64Kb di memoria per il codice e 10Kb di RAM, il che consente di applicare il progetto per l'esecuzione di applicazioni compilate in WebAssembly su <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/wasm3\/wasm3\/tree\/master\/platforms\">microcontrollori<\/a><\/noindex>, come Arduino MKR*, Arduino Due, Particle Photon, ESP8266, ESP32, Air602 (W600), nRF52, nRF51 Blue Pill (STM32F103C8T6), MXChip AZ3166 (EMW3166),<br \/>\nMaix (K210), HiFive1 (E310), Fomu (ICE40UP5K) e ATmega1284, oltre che su schede e computer basati su architetture x86, x64, ARM, MIPS, RISC-V e Xtensa. Le seguenti versioni di sistemi operativi sono supportate: Linux (compresi i router basati su OpenWRT), Windows, macOS, Android e iOS. \u00c8 anche possibile compilare wasm3 in codice intermedio WebAssembly per eseguire l'interprete in un browser o per un'auto-esecuzione (self-hosting).<\/p>\n<p>Le alte prestazioni sono ottenute grazie all'uso della tecnica nell'interprete <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/wasm3\/wasm3\/blob\/master\/source\/README.md\">Massey Meta Machine<\/a><\/noindex> (M3), dove la traduzione anticipata del bytecode in operazioni pi\u00f9 efficienti che generano codice pseudo-macchina \u00e8 eseguita per ridurre l'overhead della decodifica. Il modello di esecuzione della macchina virtuale a stack viene convertito in un approccio basato su registri pi\u00f9 efficiente. Le operazioni in M3 sono funzioni C, i cui argomenti sono i registri della macchina virtuale, riflettibili ai registri della CPU. Sequenze frequenti di operazioni vengono ottimizzate in operazioni aggregate.<\/p>\n<p>Inoltre, si pu\u00f2 notare <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sec.cs.tu-bs.de\/pubs\/2019a-dimva.pdf\">i risultati di uno studio<\/a><\/noindex> distribuzione<br \/>\nWebAssembly nel Web. Analizzando 948 mila dei siti pi\u00f9 popolari secondo la classifica di Alexa, i ricercatori hanno scoperto che WebAssembly \u00e8 utilizzato su 1639 siti (0.17%), ovvero 1 su ogni 600 siti. Complessivamente, sono stati caricati 1950 moduli WebAssembly, di cui 150 unici. Esaminando l'uso di WebAssembly, sono emerse conclusioni poco rassicuranti: in oltre il 50% dei casi, WebAssembly \u00e8 stato impiegato per scopi dannosi, come il mining di criptovalute (55.7%) e per oscurare il codice di script malevoli (0.2%). Tra le applicazioni legittime di WebAssembly si segnalano l'esecuzione di librerie (38.8%), la creazione di giochi (3.5%) e l'esecuzione di codice scritto in linguaggi diversi da JavaScript (0.9%). Nel 14.9% dei casi, WebAssembly \u00e8 stato usato per analizzare l'ambiente per l'identificazione degli utenti (fingerprinting).<br \/>\n<center><img decoding=\"async\" alt=\"Primo rilascio di wasm3, un veloce interprete WebAssembly\" src=\"\/wp-content\/uploads\/2020\/01\/2df8e1633e47b0ce5d550565419bf008.png\" style=\"display:block;margin: 0 auto;\" \/><\/center><\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52177\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043f\u0435\u0440\u0432\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a wasm3, \u043e\u0447\u0435\u043d\u044c \u0431\u044b\u0441\u0442\u0440\u043e\u0433\u043e \u0438\u043d\u0442\u0435\u0440\u043f\u0440\u0435\u0442\u0430\u0442\u043e\u0440\u0430 \u043f\u0440\u043e\u043c\u0435\u0436\u0443\u0442\u043e\u0447\u043d\u043e\u0433\u043e \u043a\u043e\u0434\u0430 WebAssembly, \u0433\u043b\u0430\u0432\u043d\u044b\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c \u0440\u0430\u0441\u0441\u0447\u0438\u0442\u0430\u043d\u043d\u043e\u0433\u043e \u043d\u0430 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u0435 \u0434\u043b\u044f \u0437\u0430\u043f\u0443\u0441\u043a\u0430 WebAssembly-\u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u043d\u0430 \u043c\u0438\u043a\u0440\u043e\u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440\u0430\u0445 \u0438 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0430\u0445, \u0434\u043b\u044f \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u0435\u0442 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f JIT \u0434\u043b\u044f WebAssembly, \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u043f\u0430\u043c\u044f\u0442\u0438 \u0434\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b JIT \u0438\u043b\u0438 \u043d\u0435 \u0434\u043e\u043f\u0443\u0441\u043a\u0430\u0435\u0442\u0441\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u0435 \u0438\u0441\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u044b\u0445 \u0441\u0442\u0440\u0430\u043d\u0438\u0446 \u043f\u0430\u043c\u044f\u0442\u0438, \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u044b\u0445 \u0434\u043b\u044f \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 JIT. \u041a\u043e\u0434 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 \u0421\u0438 \u0438 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":55148,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-55147","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043f\u0435\u0440\u0432\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a wasm3, \u043e\u0447\u0435\u043d\u044c \u0431\u044b\u0441\u0442\u0440\u043e\u0433\u043e.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" 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