什么是 waPC? WASM 外部函数 接口 FFI Input type Return type Platform 底层 I32 I32 Unknown waPC &[u8] Result,error > Linux x86_64, macOS x86_64 ,Wi ndows x86_64, … cargo build —target wasm- unknown-unknown 也可返回请求 host Invoke(ctx,operation,payload) WAPC 流程 • Uses Length of response and error to return result res,err:= Invoke… WAPC 流程 #[no_mangle] pub fn wapc_init() { wapc::register_function("ping", ？ Software testing tool • 模拟数据规则 • 自动化测试 • Company's own protocol • Microservices • Multiple backend product line with complex upstream • Common testing platform 大公司抓包工具的需求 软件测试工具 • 模拟数据规则 • 自动化测试

node 2 node 3 node 4 node … Protocol 1 app 1 app 2 app 3 app n Every app has its own backend and frontend implementations. General User Text Persistence protocol https://github.com/eightfish-org/gutp

rules: MATCH -> pushdown Planning Strategies Graph Execution Code Gen JIT Cost model Storage backend （ Property Graph KV store ） Pushdown filter Cypher (a)-[:LIKES]->(b) 计算下推：面向图应用特征设计 分布式存储 Find

 |13 Ranges  Example of chaining views: vector data { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }; auto result { data | views::filter([](const auto& value) { return value % 2 == 0; })/* 2 4 6 8 10 */ | "12" */  Note: all lazily executed: nothing is done until you iterate over result  Working with infinite sequences: auto result { view::ints(10) | views::filter([](const auto& value) { return value Official name: three-way comparison operator  Three-way: comparing 2 objects and then comparing result with 0  (a <=> b) < 0 // true if a < b  (a <=> b) > 0 // true if a > b  (a <=> b) == 0

writes 43  C++23 mandates that whitespace after a \ line continuation character is stripped, so result should be 1 Extra space behind \C++23 Standard Library36 Agenda  C++23 Core Language  Explicit : std::string GeneratePattern(const std::string& pattern, size_t count) { std::string result; result.reserve(pattern.size() * count); for (size_t i = 0; i < count; i++) { // Not optimal: // - Updates size and checks for potential resize 'count' times result.append(pattern); } return result; }59 basic_string::resize_and_overwrite()  E.g.: std::string GeneratePattern(const

STD::EXECUTION Sender adaptors Returns a sender that… then(sender, fn) → sender … transforms the result value of the operation with a function. upon_[error|done](sender, fn) → sender … transforms the the error and done signals with a function. let_[value|…](sender, fn) → sender … passes the result of input sender to function, which returns new sender. when_all(senders...) → sender … completes when ) by invoking the callable and // passing the result to the inner receiver: template requires ex::receiver_ofresult_t> void set_value(As&&... as) && {

ratio<1, 60>; // 1/60 using r2 = ratio<1, 30>; // 1/30 using result = ratio_add::type; cout << format("sum = {}/{}", result::num, result::den);// 1/20  Comparisons with ratio_equal, ratio_not_equal 2020y / June / 22d } + 9h + 35min + 10s }; auto d3 { d2 + years { 1 } }; // Add 1 year to d2  Result d2 = 2020-06-22 09:35:10 d3 = 2021-06-22 15:24:22 ⚠ Adding 1 year does not add: 86,400 * 1 year. year_month_day ymd3{ ymd2 + years{ 1 } }; auto d3{ sys_days{ ymd3 } + d2_seconds };  Result t2 = 2020-06-22 09:35:10 t3 = 2021-06-22 09:35:1038 Agenda  Compile-Time Rational Numbers 

year y{2021}; std::cout << y << "\n"; month m{October}; auto result = m + months{3}; std::cout << result << "\n"; } Output: 2021 Jan12 Some examples: Simple Calendrical Types using namespace std::chrono; int main() { weekday wd{Thursday}; auto result = wd + days{4}; std::cout << result << "\n"; weekday sun1{0}; weekday sun2{7}; std::cout << sun1 <<

label namespace default istio-injection=disabled/enabled ） http http http http http http http Result: can access reviews-v1, reviews-v2 and reviews-v3 Access productpage #IstioCon Istio Identity istio-proxy curl localhost:15000/config_dump #IstioCon Istio identity – check configuration result ● Result: cert generated automatically with Istio identity 1) Apply peer-authentication to enable server

Test topology Test result Service type Short connection cps Short connection P99 latency Long connection pps ClusterIP +40% -31% not available NodePort +64% -47% +22% Test result • Perf shows number