- reflog(参照ログ)とは HEAD やブランチ先端の動きの履歴
- 各個人のローカルリポジトリに存在
- ブランチの切り替え、新たに加えられた変更のプル、履歴の書き換え、あるいは単なる新規コミットの実行などを記録
git reflog
で HEAD の移動履歴を、git reflog <ブランチ名>
でそのブランチ先端が指していたコミットの一覧を確認可能HEAD@{5}
: HEAD の五つ前の状態を示す
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// Path pattern: /issues | |
// Type : JavaScript | |
$(function() { | |
$('table.list.issues a.parent').each(function() { | |
if (!this.nextSibling) return; | |
this.title = this.nextSibling.textContent.substr(2); | |
this.nextSibling.parentNode.removeChild(this.nextSibling); | |
}); |
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Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |