| { | |
| "traceEvents": [ | |
| { | |
| "name": "process_name", | |
| "ph": "M", | |
| "pid": 0, | |
| "args": { | |
| "name": "Allocators" | |
| } | |
| }, |
| { | |
| "traceEvents": [ | |
| { | |
| "name": "process_name", | |
| "ph": "M", | |
| "pid": 0, | |
| "args": { | |
| "name": "Allocators" | |
| } | |
| }, |
顧名思義，這是個炫耀分享網址縮短器能做多快的小專案，峰值能處理 140+ qps，Github 連結在此。
最近投了 Dcard 實習，其中後端實習的功課就是寫個網址縮短器。然而，活在電腦世界中這麼久了，還沒好好用過 Redis/Load balancer 這些黑科技，為了在 Backend Taiwan 繼續混下去，我決定來好好跟黑科技奮戰一波。
前端採用 Nginx 分配請求 (Request) 給後端，後端採用 Nodejs，資料庫採用 MySQL，記憶體快取 (Cache) 採用 Redis，下圖言簡意賅的顯示了整個架構。
| #include <iostream> | |
| #include <memory.h> | |
| using namespace std; | |
| int dp[6][6][6][6][6]; | |
| int promo_amount[5][100], promo_sum[100], amount[5], price[5];; | |
| int id_mapping[1000]; | |
| int id = 0; |
| //+------------------------------------------------------------------+ | |
| //| HelloWorld.mq5 | | |
| //| Copyright 2022, MetaQuotes Ltd. | | |
| //| https://www.mql5.com | | |
| //+------------------------------------------------------------------+ | |
| #property copyright "Copyright 2022, MetaQuotes Ltd." | |
| #property link "https://www.mql5.com" | |
| #property version "1.00" | |
| #include <Trade\Trade.mqh> |
| # Copyright 2021 Optiver Asia Pacific Pty. Ltd. | |
| # | |
| # This file is part of Ready Trader Go. | |
| # | |
| # Ready Trader Go is free software: you can redistribute it and/or | |
| # modify it under the terms of the GNU Affero General Public License | |
| # as published by the Free Software Foundation, either version 3 of | |
| # the License, or (at your option) any later version. | |
| # | |
| # Ready Trader Go is distributed in the hope that it will be useful, |
| from collections import defaultdict, deque | |
| from shioaji import BidAskFOPv1, Exchange | |
| import shioaji as sj | |
| import datetime | |
| import pandas as pd | |
| import talib as ta | |
| import time | |
| from math import ceil | |
| import pysimulation |
| const int maxi = CHAR_MAX; | |
| /* int is a int */ | |
| /* multiple lines | |
| of comments */ | |
| const int maxi = CHAR_MAX; | |
| #pragma token off | |
| int main() { | |
| int a = 1; |
To whom it may concern,
It is my pleasure to recommend [Name of the person being recommended]. I had the privilege of working with [Name] at FinLab, a startup company specializing in quantitative investment. Through our professional relationship, I've come to deeply appreciate their expertise and dedication.
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To whom it may concern,
I am writing to highly recommend [Your Name] with whom I had the pleasure to work at FinLab, a pioneering startup dedicated to quantitative investment. Through our professional association, I have had ample opportunities to observe and appreciate the exemplary skill and ambition [Your Name] demonstrates in the field of quantitative analysis and financial technology.
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During [his/her] tenure at Jim Quant Capital and later at FinL
