{"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\/et\/blog\/novosti-interneta\/pervyj-vypusk-wasm3-bystrogo-interpretatora-webassembly","title":{"rendered":"Esimene v\u00e4ljaanne wasm3, kiire WebAssembly t\u00f5lkija","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Saadaval<\/a><\/noindex> esimene v\u00e4ljaanne wasm3<\/a><\/noindex>, v\u00e4ga kiire vahendid vahe-koodi t\u00f5lkija WebAssembly, mis on peamiselt m\u00f5eldud WebAssembly rakenduste k\u00e4itamiseks mikroprotsessorites ja platvormides, kus JIT WebAssembly rakenduse rakendus puudub, m\u00e4lu on JIT t\u00f6\u00f6tamiseks ebapiisav v\u00f5i ei ole lubatud luua k\u00e4itatavaid m\u00e4lulehti, mis on vajalikud JIT rakendamiseks. Projekti kood on kirjutatud keeles C ja GNU \u00dcldine Avaliku litsentsi alusel.<\/a><\/noindex> on MIT litsentsi all.<\/p>\n

Wasm3 l\u00e4bib testid<\/a><\/noindex> WebAssembly 1.0 spetsifikatsiooniga \u00fchilduvuse ja seda saab kasutada paljude WASI rakenduste k\u00e4itamiseks, pakkudes tulemuslikkust, mis on ainult 4-5 korda madalam kui JIT- mootori (liftoff<\/a><\/noindex>, cranelift<\/a><\/noindex>) ja 11,5 korda madalam kui natiivkoodi t\u00e4itmine. V\u00f5rreldes teiste WebAssembly t\u00f5lkijatega (wac<\/a><\/noindex>, life<\/a><\/noindex>, wasm-micro-runtime<\/a><\/noindex>), oli wasm3 15,8 korda kiirem.<\/p>\n

Wasm3 t\u00f6\u00f6ks on vajalik 64Kb m\u00e4lu koodi jaoks ja 10Kb RAM-i, mis v\u00f5imaldab projekti kasutada WebAssembly rakenduste t\u00e4itmiseks mikroprotsessorites<\/a><\/noindex>, nagu Arduino MKR*, Arduino Due, Particle Photon, ESP8266, ESP32, Air602 (W600), nRF52, nRF51 Blue Pill (STM32F103C8T6), MXChip AZ3166 (EMW3166),
\nMaix (K210), HiFive1 (E310), Fomu (ICE40UP5K) ja ATmega1284, samuti platvormidel ja arvutites, mis p\u00f5hinevad arhitektuuridel x86, x64, ARM, MIPS, RISC-V ja Xtensa. Toetatakse operatsioonis\u00fcsteeme Linux (sealhulgas OpenWRT-p\u00f5hised ruuterid), Windows, macOS, Android ja iOS. Samuti on v\u00f5imalik kompileerida wasm3 vaheformaat WebAssembly jaoks, et k\u00e4ivitada t\u00f5lgendaja brauseris v\u00f5i teostada sisemist k\u00e4ivitamist (self-hosting).<\/p>\n

Kohene j\u00f5udlus saavutatakse t\u00f5lgendaja rakendamisel meetodite kasutamise kaudu Massey Meta Machine<\/a><\/noindex> (M3), kus kulude v\u00e4hendamiseks baitkoodi dekodeerimisel toimub eelnevalt baitkoodi t\u00f5lkimine t\u00f5husamatesse toimingutesse, mis genereerivad pseudomasinakoode, ja virna virtuaalse masina v\u00e4ljundmudel muudetakse efektiivsemaks registri l\u00e4henemiseks. M3-s toimingud on C-funktsioonid, mille argumentideks on virtuaalmasina registrid, mis v\u00f5ivad peegelduda CPU registritesse. Tihti esinevad toimingute j\u00e4rjestused optimeeritakse kokkuv\u00f5tlikeks toiminguteks.<\/p>\n

Lisaks saab m\u00e4rkida uurimistulemused<\/a><\/noindex> levik
\nWebAssembly veebis. Anal\u00fc\u00fcsides 948 000 k\u00f5ige populaarsemat saiti Alexa edetabelis, selgus, et WebAssembly't kasutatakse 1639 lehelt (0,17%), st igas 600-s veebilehes. Kogu veebilehtedel tuvastati 1950 WebAssembly moodulit, millest 150 oli unikaalsed. WebAssembly rakenduste uurimisel tehti pettumust valmistavad j\u00e4reldused - enam kui 50% juhtudest kasutati WebAssembly't kurjategijate eesm\u00e4rkidel, n\u00e4iteks kr\u00fcptovaluuta kaevandamiseks (55,7%) ja pahatahtlike skriptide koodi varjamiseks (0,2%). Legitiimsetest rakendustest, mille puhul WebAssembly't on m\u00e4rkatud, on raamatukogude t\u00e4itmine (38,8%), m\u00e4ngude loomine (3,5%) ja enda kirjutatud koodi t\u00e4itmine, mis ei ole JavaScriptis (0,9%). 14,9% juhtudest kasutati WebAssembly't keskkonna anal\u00fc\u00fcsimiseks kasutaja identifitseerimiseks (fingerprinting).
\n

\"Esimene<\/center><\/p>\n

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

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

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