Tomasz Sterna smokku
pcolby
/ xmlToVariant.cpp
Last active
December 28, 2022 19:44
Sample function for parsing a QXmlStreamReader (or part thereof) to a QVariant tree.
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| QVariantMap xmlStreamToVariant(QXmlStreamReader &xml, const QString &prefix = QLatin1String("."), const int maxDepth = 1024) | |
| { | |
| if (maxDepth < 0) { | |
| qWarning() << QObject::tr("max depth exceeded"); | |
| return QVariantMap(); | |
| } | |
| if (xml.hasError()) { | |
| qWarning() << xml.errorString(); | |
| return QVariantMap(); |
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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 |
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