Ithimba labaphenyi abavela emanyuvesi ahlukahlukene AbaseMelika, abakwa-Israyeli nabase-Australia ithuthukise ukuhlaselwa okubhekiswe kwiziphequluli zewebhu ezivumela ukukhishwa kolwazi mayelana nokuqukethwe kwesilondolozi se-processor. Indlela isebenza kwiziphequluli ngaphandle kweJavaScript kanye nezinye izindlela ezimbili zokuvikela ezikhona ekuhlaselweni ngeziteshi ezivela eceleni, kufaka phakathi lezo ezisetshenziswe kusiphequluli seTor naseDeterFox.
Ukuhlaziya okuqukethwe kunqolobane ku- konke ukuhlaselwa kusebenzisa indlela ye- "Prime + Probe", ukuthi kufaka phakathi ukugcwalisa inqolobane ngamanani ayizethenjwa nokunquma izinguquko ngokukala isikhathi sokufinyelela kubo lapho zivuselelwa kabusha. Ukuze kudlule izindlela zokuphepha ezikhona kwiziphequluli, ezivimbela ukukalwa kwesikhathi okunembile, ezinhlotsheni ezimbili kubizwa i-DNS ehlaselayo noma iseva yeWebSocket, egcina irekhodi lesikhathi sokutholwa kwezicelo. Kokunye ukwenziwa, isikhathi sempendulo ye-DNS esimisiwe sisetshenziswa njengesethenjwa sesikhathi.
Izilinganiso ezenziwe kusetshenziswa amaseva we-DNS angaphandle noma iWebSocket, ngenxa yokusetshenziswa kohlelo lokuhlukaniswa olususelwa ekufundeni komshini, bezanele ukubikezela amanani ngokunemba kuka-98% esimweni esihle kakhulu (ngokwesilinganiso esingu-80-90%). Izindlela zokuhlasela zivivinywe kuzingxenyekazi ezahlukahlukene zehadiwe (i-Intel, i-AMD Ryzen, i-Apple M1, i-Samsung Exynos) futhi kukhombise ukuthi ziyahlukahluka.
Ukwahluka kokuqala kokuhlaselwa komjaho we-DNS isebenzisa ukuqaliswa kwakudala kwendlela yePrime + Probe kusetshenziswa ukuhlelwa kweJavaScript. Umehluko wehlela ekusetshenzisweni kwesibali sikhathi esisekelwe kwi-DNS sangaphandle nesiphathi sephutha esivuthayo lapho sizama ukulayisha isithombe kusuka kusizinda esingekho. Isibali sikhathi sangaphandle sivumela ukuhlaselwa kwe-Prime + Probe kuziphequluli ezikhawulela noma zikhubaze ngokuphelele ukufinyelela kwe-JavaScript timer.
Kwiseva ye-DNS ebanjwe kunethiwekhi efanayo ye-Ethernet, ukunemba kwesibali sikhathi kulinganiselwa ukuthi kungama-2 ms, okwanele ukwenza ukuhlaselwa kwesiteshi eseceleni (ukuqhathanisa: ukunemba kwesibali sikhathi esivamile seJavaScript kusiphequluli seTor yehliswe yaya ku-100ms). Ngokuhlaselwa, akukho ukulawulwa kwiseva ye-DNS okudingekayo, njengoba isikhathi sokwenza umsebenzi sikhethiwe ukuze isikhathi sokuphendula se-DNS sisebenze njengesiginali sokuqedwa kwangaphambi kwesikhathi kokuqinisekiswa (kuya ngokuthi ngabe isiphatho sephutha siqale ekuqaleni noma kamuva). , kuphethwa ukuthi ukusebenza kokuqinisekisa okunenqolobane kuqediwe) ...
Ukuhlaselwa kwesibili kwe- "String and Sock" kuklanyelwe ukweqa amasu okuphepha evimbela ukusetshenziswa kwamalungu afanayo weJavaScript esezingeni eliphansi. Esikhundleni samalungu afanayo, i-String ne-Sock zisebenzisa ukusebenza ezintanjeni ezinkulu kakhulu, ubukhulu bazo obukhethiwe ukuze okuguquguqukayo kumboze yonke inqolobane ye-LLC (isilondolozi sezinga eliphezulu).
Okulandelayo, kusetshenziswa umsebenzi we-indexOf (), uchungechunge oluncane luyaseshwa entanjeni, ekuqaleni engekho entanjeni yokuqala, okungukuthi, umsebenzi wokusesha uholela ekuphindaphindeni ngentambo yonke. Njengoba usayizi womugqa uhambelana nosayizi we-LLC cache, ukuskena kuvumela ukusebenza kwesheke kwe-cache ukwenziwa ngaphandle kokukhohlisa ukuhlelwa. Ukukala ukubambezeleka, esikhundleni se-DNS, lokhu kuyisikhalazo kuseva ehlaselayo yeWebSocket elawulwa ngumhlaseli: ngaphambi kokuqala nangemva kokuphela komsebenzi wokusesha, izicelo zithunyelwa ku-chain,
Uhlobo lwesithathu lokuhlasela kwe- "CSS PP0" nge-HTML ne-CSS, futhi lungasebenza kwiziphequluli ezineJavaScript ekhutshaziwe. Le ndlela ibukeka njenge- "String and Sock" kepha ayibophezelekile kuJavaScript. Lokhu kuhlasela kukhiqiza isethi yabakhethi be-CSS abasesha ngemaski. Ulayini omkhulu wokuqala ogcwalisa inqolobane isethwe ngokwakha ithegi ye-div enegama leklasi elikhulu kakhulu, futhin okuphakathi ngaphakathi kunesethi yamanye ama-div anezihlonzi zawo.
Ngamunye we lawa ma-div ahlanganisiwe afakwe isitayela esibheka i-substring. Lapho kunikezwa ikhasi, isiphequluli kuqala sizame ukucubungula ama-div angaphakathi, okuholela ekuseshweni ngentambo enkulu. Usesho lwenziwa kusetshenziswa imaski ecacile elahlekile futhi kuholele ekuphindaphindweni kwentambo yonke, ngemuva kwalokho kubangelwe isimo "cha" bese kwenziwa umzamo wokulayisha isithombe sangemuva.