Random-Access • Can we print(deque{-1, -1, -1}); ? • candidate function not viable: no known conversion from 'std::deque >' to 'const span' for 1st argument • This files • Failed checks display the edits that clang-format wants • Building all architectures is very fast • Testing x86/x64 takes about an hour • Many tests, multiplied by many compiler configurations42

Pointer Synchronous Reclamation Beyond Concurrency TS2 – Maged Michael Why use hazard pointers? • Fast (low nanoseconds) and scalable protection. • Supports arbitrary protection duration (e.g., the user-defined thousands of threads. Is there a good solution using the default domain? Is there any good solution? Fast Scalable Robust Synchronous Reclamation Hazard Pointer Synchronous Reclamation Beyond Concurrency foo_remove_obj(k); obj->set_cohort(&cohort_); obj->retire(); } }; Cohort Implementation Requirements • Fast and scalable operations including destruction • Seamless support for dependent retirement (objects

Gen” X-Plat Native Binary Choice Nativ e Hybri d ? Best experience ? One platform at a time ? Fast to market ? Compromise on UX https://info.dynatrace.com/rs/compuware/images/ Mobile_App_Survey_Report com/rs/compuware/images/ Mobile_App_Survey_Report.pdf Nativ e Hybri d ? Fast to market ? Best experience Binary Choice Native JavaScript ? Fast to market ? Best experience Native App "JavaScript-Driven Native" Native UI (no WebView!) • Full access to device APIs • Immediate access to new OS features ? Fast to market ? Best experience Intro to NativeScript What is it? How does it work? 2013 2014 2015 2016

Magical Flag Add new column PTS Magical Flag Why fast? Clickhouse Mutation PTS Magical Flag Why fast? Clickhouse Mutation PTS Magical Flag Why fast? Clickhouse Mutation Trouble Shoot ● SQL is

// 30sec = 0.5min duration> d8 { d7 }; // minutes // Error! // Force conversion (0 instead of 0.5) auto d8 { duration_cast>>(d7) }; // = 015 Durations locate_zone("Europe/Brussels") }; auto* gmt { locate_zone("GMT") }; auto* current { current_zone() };  Conversion between time zones: // Convert the current system time to GMT. gmt->to_local(system_clock::now());

you to convert a time_point for one clock to an equivalent time_point for another clock. This conversion takes the epochs of the source and destination clock into account as well as whether each clock all Daylight Saving Time’s fault)40 sys_time and local_time conversions It’s possible for a conversion from a local_time to a sys_time to throw two different exceptions: • ambiguous_local_time

__fdividef(x, y) 提供更快的浮点除法 ，和一般的除法有相同的精确度，但是在 2^216 < y < 2^218 时会得到错误的结果。 编译器选项： --use_fast_math • 如果开启了 --use_fast_math 选项，那么所有对 sinf 的调用都会自动被替换成 __sinf 。 • --ftz=true 会把极小数 (denormal) 退化为 0 。 • --prec-div=false --prec-sqrt=false 降低开方的精度换取速度。 • --fmad 因为非常重要，所以默认就是开启的， 会自动把 a * b + c 优化成乘加 (FMA) 指令。 • 开启 --use_fast_math 后会自动开启上述所有。 SAXPY （ Scalar A times X Plus Y ） • 即标量 A 乘 X 加 Y 。 • 这是很多 CUDA 教科书上的 Hello,

com/WowWeeLabs/MiP-BLE-Protocol/blob/master/MiP-Protocol.md Sending commands WowWee Gotcha #1 Strange conversion to hex to string :s Reading data Add Listener (Receive DS) Request Data (Send DS) onNotify

utc{ sys_days{2020y/September/15d} + 9h + 35min + 10s };//2020-09-15 09:35:10 UTC  Timezone conversion:  Convert UTC to Denver time: zoned_time denver { "America/Denver", utc };  Get current local

Flexible schema • You can have columns with strict and flexible schema in one table • Queries work as fast as with predefined types! Planned for Q1 2022. Developer: Anton Popov. Выводы 31 Вместе с новой