{"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\/sk\/blog\/news\/pervyj-vypusk-wasm3-bystrogo-interpretatora-webassembly","title":{"rendered":"Prv\u00e9 vydanie wasm3, r\u00fdchleho interpret\u00e1tora WebAssembly","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Dostupn\u00fd<\/a><\/noindex> prv\u00fd vydanie wasm3<\/a><\/noindex>, ve\u013emi r\u00fdchly interpret\u00e1tor medzi\u010dl\u00e1nkov\u00e9ho k\u00f3du WebAssembly, hlavne navrhnut\u00fd na implement\u00e1ciu pre sp\u00fa\u0161\u0165anie WebAssembly aplik\u00e1ci\u00ed na mikrokontrol\u00e9roch a platform\u00e1ch, kde nie je implement\u00e1cia JIT pre WebAssembly, nie je dostatok pam\u00e4te na pr\u00e1cu JIT alebo nie je povolen\u00e9 vytv\u00e1ranie vykon\u00e1vac\u00edch str\u00e1nok pam\u00e4te potrebn\u00fdch na implement\u00e1ciu JIT. K\u00f3d projektu je nap\u00edsan\u00fd v jazyku C a distribuovan\u00fd<\/a><\/noindex> pod licenciou MIT.<\/p>\n

Wasm3 prech\u00e1dza testy<\/a><\/noindex> kompatibilitou so \u0161pecifik\u00e1ciou WebAssembly 1.0 a m\u00f4\u017ee sa pou\u017ei\u0165 na spustenie mnoh\u00fdch WASI aplik\u00e1ci\u00ed, poskytuj\u00fac v\u00fdkon len 4-5 kr\u00e1t ni\u017e\u0161\u00ed ako JIT enginy (liftoff<\/a><\/noindex>, cranelift<\/a><\/noindex>) a 11,5 kr\u00e1t ni\u017e\u0161\u00ed ako vykon\u00e1vanie nat\u00edvneho k\u00f3du. Pri porovnan\u00ed s in\u00fdmi interpret\u00e1tormi WebAssembly (wac<\/a><\/noindex>, life<\/a><\/noindex>, wasm-micro-runtime<\/a><\/noindex>), wasm3 bol r\u00fdchlej\u0161\u00ed 15,8 kr\u00e1t.<\/p>\n

Na prev\u00e1dzku wasm3 je potrebn\u00fdch 64KB pam\u00e4te na k\u00f3d a 10KB RAM, \u010do umo\u017e\u0148uje aplik\u00e1ciu projektu na vykon\u00e1vanie skompilovan\u00fdch WebAssembly aplik\u00e1ci\u00ed na mikrokontrol\u00e9roch<\/a><\/noindex>, ako Arduino MKR*, Arduino Due, Particle Photon, ESP8266, ESP32, Air602 (W600), nRF52, nRF51 Blue Pill (STM32F103C8T6), MXChip AZ3166 (EMW3166),
\nMaix (K210), HiFive1 (E310), Fomu (ICE40UP5K) a ATmega1284, ako aj na dosk\u00e1ch a po\u010d\u00edta\u010doch zalo\u017een\u00fdch na architekt\u00farach x86, x64, ARM, MIPS, RISC-V a Xtensa. Z opera\u010dn\u00fdch syst\u00e9mov s\u00fa podporovan\u00e9 Linux (vr\u00e1tane routerov zalo\u017een\u00fdch na OpenWRT), Windows, macOS, Android a iOS. Mo\u017en\u00e1 je aj kompil\u00e1cia wasm3 do medzi\u010dl\u00e1nkov\u00e9ho k\u00f3du WebAssembly na spustenie interpret\u00e1tora v prehliada\u010di alebo na vlo\u017een\u00e9 spustenie (self-hosting).<\/p>\n

Vysok\u00fd v\u00fdkon sa dosahuje v\u010faka pou\u017eitiu techniky Massey Meta Machine<\/a><\/noindex> (M3), v ktorej sa na zn\u00ed\u017eenie re\u017eijn\u00fdch n\u00e1kladov na dek\u00f3dovanie bajtk\u00f3du vykon\u00e1va predbe\u017en\u00e1 transl\u00e1cia bajtk\u00f3du na efekt\u00edvnej\u0161ie oper\u00e1cie, generuj\u00face pseudo-strojov\u00fd k\u00f3d, a model vykon\u00e1vania z\u00e1sobn\u00edkovej virtu\u00e1lnej ma\u0161iny sa transformuje na efekt\u00edvnej\u0161\u00ed registra\u010dn\u00fd pr\u00edstup. Oper\u00e1cie v M3 predstavuj\u00fa C funkcie, ktor\u00fdch argumentmi s\u00fa registry virtu\u00e1lnej ma\u0161iny, ktor\u00e9 m\u00f4\u017eu by\u0165 mapovan\u00e9 na registry CPU. \u010casto sa vyskytuj\u00face sekvencie oper\u00e1ci\u00ed na optimaliz\u00e1ciu sa transformuj\u00fa na s\u00fahrnn\u00e9 oper\u00e1cie.<\/p>\n

Navy\u0161e m\u00f4\u017eeme spomen\u00fa\u0165 v\u00fdsledky v\u00fdskumu<\/a><\/noindex> distrib\u00facie
\nWebAssembly na webe. Analyzovan\u00edm 948 tis\u00edc najpopul\u00e1rnej\u0161\u00edch str\u00e1nok pod\u013ea rebr\u00ed\u010dka Alexa, v\u00fdskumn\u00edci zistili, \u017ee WebAssembly sa pou\u017e\u00edva na 1639 str\u00e1nkach (0,17 %), t.j. na 1 z ka\u017ed\u00fdch 600 str\u00e1nok. Na str\u00e1nkach bolo zisten\u00e9 na\u010d\u00edtanie 1950 modulov WebAssembly, z ktor\u00fdch 150 je unik\u00e1tnych. Pri zoh\u013eadnen\u00ed oblasti pou\u017eitia WebAssembly sa urobili sklamanliv\u00e9 z\u00e1very \u2014 vo viac ako 50 % pr\u00edpadov bol WebAssembly pou\u017eit\u00fd na \u0161kodliv\u00e9 \u00fa\u010dely, ako napr\u00edklad na \u0165a\u017ebu kryptomien (55,7 %) a skr\u00fdvanie k\u00f3du \u0161kodliv\u00fdch skriptov (0,2 %). Z legit\u00edmnych aplik\u00e1ci\u00ed WebAssembly sa spomenulo vykon\u00e1vanie kni\u017en\u00edc (38,8 %), vytv\u00e1ranie hier (3,5 %) a sp\u00fa\u0161\u0165anie vlastn\u00e9ho k\u00f3du, ktor\u00fd nebol nap\u00edsan\u00fd v JavaScripte (0,9 %). V 14,9 % pr\u00edpadoch sa WebAssembly pou\u017eil na anal\u00fdzu prostredia na identifik\u00e1ciu pou\u017e\u00edvate\u013ea (fingerprinting).
\n

\"Prv\u00e9<\/center><\/p>\n

<\/a><\/noindex><\/p>\n

Zdroj: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\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 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