Dropbox 從 SPDY 切換到 HTTP/2 發現的現象

Dropbox 將本來的 SPDY 切換到 HTTP/2 後整理了不少資料:「Enabling HTTP/2 for Dropbox web services: experiences and observations」。

大多數都是效能的改善,但「Increased latency for POST requests.」這段頗有趣的,找出了 nginx 的 bug:

POST 的 latency 大約增加了 50%,而實際追蹤問題發現是 nginx 中 SETTINGS_INITIAL_WINDOW_SIZE 預設值的問題,然後提出 patch 改善:「[nginx] HTTP/2: rewritten handling of request body.」:

There is a small issue with setting `SETTINGS_INITIAL_WINDOW_SIZE` to 0: now when client tries to POST data it needs to wait for an additional RTT(between `send HEADERS` and `recv WINDOW_UPDATE`) to start sending data.

用 JavaScript 寫的 NLP Library

nlp-compromise/nlp_compromise 是一個 JavaScript 寫的 NLP library,網頁上給的用法也很特別...


nlp.text('She sells seashells').to_past()
// She sold seashells


// "dinosaurs"


nlp.statement('She sells seashells').negate().text()
// She doesn't sell seashells


nlp.sentence('I fed the dog').replace('the [Noun]', 'the cat').text()
// I fed the cat


nlp.text("Tony Hawk did a kickflip").people();
// [ Person { text: 'Tony Hawk' ..} ]


// "a"


nlp.person("Tony Hawk").pronoun();
// "he"


nlp.value("five hundred and sixty").number;
// 560

好像是好玩的東西... XD

Facebook 操弄 Trending 裡的新聞

看了 GizmodoFacebook 的對話,就有種之前某長輩常說的「沒被抓到就不算犯罪喔~」的感覺:「Former Facebook Workers: We Routinely Suppressed Conservative News」。

Gizmodo 接到前員工的線報後,再加上透過關係問到其他的前員工,證實了標題的消息:

Facebook workers routinely suppressed news stories of interest to conservative readers from the social network’s influential “trending” news section, according to a former journalist who worked on the project. This individual says that workers prevented stories about the right-wing CPAC gathering, Mitt Romney, Rand Paul, and other conservative topics from appearing in the highly-influential section, even though they were organically trending among the site’s users.

Several former Facebook “news curators,” as they were known internally, also told Gizmodo that they were instructed to artificially “inject” selected stories into the trending news module, even if they weren’t popular enough to warrant inclusion—or in some cases weren’t trending at all. The former curators, all of whom worked as contractors, also said they were directed not to include news about Facebook itself in the trending module.

當然 Facebook 對於這種沒辦法證實的事情是全盤否認,不過再重複一次某長輩的「沒被抓到就不算犯罪喔~」的經典台詞...

GitHub 大幅調漲企業方案

GitHub 推出以 user 數量計費的方案:「Introducing unlimited private repositories」。舊的方案可以參考在「web.archive.org」這邊記錄下來的內容。

這個方案下的個人帳號會大幅受益:原先最低消費的 USD$7/month 是 5 private repositories,現在變成 unlimited private repositories。

而企業方案將會大幅調漲,雖然現有的 Plan 還是存在,但有種開始殺雞的味道了。

以前 USD$200/month 可以買到 125 個 repository,現在只能給 22 個人用。同時因為 GitHub 對 deploy key 的限制,跨 repository 時無法重複使用同一把 key,就需要用到真正的 user account,這點就變成額外的成本了。


解譯機械碼的 Panopticon

Panopticon 看起來頗不錯,可以直接解機械碼轉成 assembly,再把 flow 畫出來讓人理解:

不過還不知道遇到 dynamic self-decoding 的程式會怎麼處理,另外我記得好像有些商用的 solution 已經有提供了,不知道相比起來如何。

BitKeeper 的 Open Source 行為

LWN 上看到這個消息:「BitKeeper's open source release」,BitKeeper 網站上也已經看到 open source 的消息了。

從 2005 年跟 Linux 分家後,走了十年走到這條路... 在「This is to answer this question and all the "too late" comments.」這邊看到是這樣做出來的決定,看起來沒救了:

Git/Github has all the market share. Trying to compete with that just proved to be too hard. So rather than wait until we were about to turn out the lights, we decided to open source it while we still had money in the bank and see what happens. We've got about 2 years of money and we're trying to build up some additional stuff that we can charge for. We're also open to being doing work for pay to add whatever it is that some company wants to BK, that's more or less what we've been doing for the last 18 years.

Will it work? No idea. We have a couple of years to find out. If nothing pans out, open sourcing it seemed like a better answer than selling it off.

Reddit 在規劃要禁止「阻擋 Adblock 的網站」

如標題所說的,Reddit 在規劃這些阻擋 Adblock 的網站:「Mod Announcement: We're considering banning all domains that require users to disable ad blockers and we'd like your input」。

這些網站要求使用者將網站列入 Adblock 白名單,然後這些網站就會「不小心」推送 malware 給使用者:

It has come to our attention that many websites such as Forbes and Wired are now requiring users to disable ad blockers to view content. Because Forbes requires users to do this and has then served malware to them we see this as a security risk to you our community. There are also sites such as Wall Street Journal that have implemented pay-walls which we were are also considering banning.


Akamai 與 Microsoft Azure CDN 合作的方案進入 GA (General Availability)

先是在 Akamai 的網站上看到說明:「Microsoft Azure CDN from Akamai Enters General Availability」,另外裡面有提到 Microsoft 的公告:「Microsoft announces general availability of Azure CDN from Akamai」。

所以 Microsoft Azure 現在提供三個不同的 CDN 方案:

  • Azure CDN Standard from Verizon
  • Azure CDN Standard from Akamai
  • Azure CDN Premium from Verizon

其中 Standard 方案的價錢都相同,而 Verizon 的 Premium 方案大約是兩倍價錢,沒猜錯的話應該是 Verizon ACCELERATE?以前 EdgeCast 的 ADN 產品線?

Uber 這類服務在北美的商務交通支出超越一般租車

Bloomberg 上看到的新聞,Uber 這類服務在北美的商務交通支出的佔有率已經超越一般租車了:「Uber Overtakes Rental Cars Among Business Travelers」。

資料來源是來自 Certify,北美第二大的雲端管理服務。所以這份資料其實還是有 bias 存在,但還是可以看出大趨勢:


Google 推出 iOS 上的搜尋輸入法 Gboard

Google 推出了 iOS 上的搜尋輸入法 Gboard:「Meet Gboard: Search, GIFs, emojis & more. Right from your keyboard.」,可以在 App Store 上下載「Gboard — Search. GIFs. Emojis & more. Right from your keyboard.」,目前只有英文版可以用,其他語言還要等:

Get it now in the App Store in English in the U.S., with more languages to come.

可以參考 Google 做的 GIF 動畫,把搜尋的功能結合進去了:

John Gruber 寫了一篇「Gboard」關於隱私問題的討論,看起來還頗正面的。除了搜尋結果當然會需要傳到 Google 的系統裡以外,只有 crash log 會匿名傳回去。