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Tag Archives: programming
StackOverflow 發 Tab/Space 戰文
StackOverflow 直接拿薪水戰 Tab 與 Space 的差異啊 XDDD：「Developers Who Use Spaces Make More Money Than Those Who Use Tabs」。 這下糟糕了 XDDD
Posted in Computer, Murmuring, Programming
Tagged developer, money, package, programming, salary, space, tab
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Heroku CI 正式推出
月初才提到「Heroku 也要進入 CI 市場...」，前幾天就開放使用了：「Heroku CI Is Now Generally Available: Fast, Low Setup CI That’s Easy to Use」。 收費方式是依照 Heroku Pipelines 收費，一個 Heroku Pipelines 是 USD$10/month： Each CI-enabled Heroku Pipeline is charged just $10/month for an unlimited number of test runs. … Continue reading
Posted in Cloud, Computer, Murmuring, Network, Programming, Software
Tagged case, ci, continuous, heroku, integration, programming, quality, saas, service, test
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Heroku 也要進入 CI 市場...
Heroku 也推出 CI 服務了：「On Building Tools for Developers: Heroku CI」，不過這篇比較有趣的應該是做了不少問卷統計 (Heroku 自己做的，預期會有 bias，心裡有底來看這些資料就好)。 大家最在意的還是各種速度 (第一與第三名)： 然後完全是 GitHub 一統天下的感覺： 另外是 Circle CI 打下不少市場，應該是半免費的策略產生的？也許應該看一看跟 Travis CI 的差距... (不過 Travis CI 的 image 居然還只有 12.04 或 14.04 可以挑，這就讓人 orz 了...)
Posted in Computer, Murmuring, Network, Programming
Tagged ci, circle, continous, github, heroku, integration, programming, travis
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各家 glob 的效能...
在「Glob Matching Can Be Simple And Fast Too」這邊看到在分析 (a.*)nb 這樣的 pattern 的效能 (像是 a.*a.*a.*b 這樣的東西)，第一波先測 shell，結果發現有趣的現象： 那個 csh 是怎麼了 XDDD Looking at the source code, it doesn’t attempt to perform glob expansion itself. Instead it calls the C library implementation … Continue reading
Posted in Computer, Murmuring, Programming, Security, Software
Tagged c, csh, fast, glob, match, matching, performance, programming, shell, speed
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Tor 在考慮使用 Rust 改寫
不過也不確定是不是愚人節消息就是了：「[tor-dev] Tor in a safer language: Network team update from Amsterdam」。 Tor 考慮使用 Rust 改寫，目前已經完成的部份，以及接下來的規劃： What has already been done: - Rust in Tor build - Putting together environment setup instructions and a (very small) initial draft for coding standards … Continue reading
「從 X 語言轉換到 Y 語言」的研究
算是個有趣的研究，看看就好：「The eigenvector of "Why we moved from language X to language Y"」。 作者先用 Google 搜尋拉出數量： 但這個方法少了保留在原語言的資料，所以後面看看就好 XD 接下來是轉換成 stochastic matrix (真是讓人懷念的東西...)： 最高的幾個語言是 Golang、C 與 Java，不過如同前面講的，因為少了留在原語言的資料，看看就好不用當真...
Posted in Computer, Murmuring, Programming
Tagged google, language, matrix, programming
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Ruby 2.4 中 Hash Table 的效能改善
前幾天 Ruby 推出了 2.4.0 (Ruby 2.4.0 Released)，其中特別被拿出來提的：「Introduce hash table improvement (by Vladimir Makarov)」。 討論串很長而且歷時很久，但可以看出來方向是提高 CPU cache 效率： Modern processors have several levels of cache. Usually,the CPU reads one or a few lines of the cache from memory (or another level … Continue reading
Posted in Computer, Murmuring, Programming, Software
Tagged cache, cpu, hash, language, performance, programming, redmine, ruby, table
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分析 GitHub 上的 Tab 與 Space
作者用 BigQuery 分析了 GitHub 上的 Tab 與 Space 的差異 (是個 flame war 開始的節奏 XDDD)：「400,000 GitHub repositories, 1 billion files, 14 terabytes of code: Spaces or Tabs?」。 可以看到除了 C 與 Go 以外，大多數的程式語言都是 Space > Tab。另外在文章下面也有使用的 BigQuery 指令可以參考。
Golang 1.7
Golang 1.7 主打更小的 binary size：「Smaller Go 1.7 binaries」： Typical programs, ranging from tiny toys to large production programs, are about 30% smaller when built with Go 1.7. 還附了一張經典的「Hello, world」程式的分析： 由於現代 CPU 的速度與 L1/L2/... cache 有緊密關係，當 binary size 變小時，常常會伴隨著 memory access … Continue reading
Posted in Computer, Murmuring, Programming, Software
Tagged binary, go, golang, language, programming, size
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在 C 裡 Concurrency 的 Library
看到「libdill: Structured Concurrency for C」這個東西，在 C 裡實作了兩個不同種類的 concurrency，一個是 proc (process-based) 一個是 go (corouting-based)。 支援的 function 算是蠻清晰的，範例也很清楚： #include <libdill.h> #include <stdio.h> #include <stdlib.h> coroutine int worker(const char *text) { while(1) { printf("%s\n", text); msleep(now() + random() % 500); } return 0; … Continue reading
Posted in Computer, Murmuring, Programming, Software
Tagged based, c, channel, concurrency, corouting, go, language, libdill, library, proc, process, programming
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