Re: [wildfly-dev] Support for DMR Streams

On 06/14/2016 06:01 AM, Rostislav Svoboda wrote: >> Hi All, >> >> The upcoming DMR 1.4.0 version will introduce DMR Streaming API [1] - >> see attachment. > Will be DMR 1.4.z included in WF 11 or also in next EAP 7 release? Most likely both. >> The idea of this new feature grew up while I was working on DMR-9 issue [2]. >> >> In short the news in upcoming JBoss DMR 1.4.0 are: >> * it will be compilable on JDK8 and above >> * it will be 100% backward compatible on binary level with previous >> version >> * it replaces old cookcc based parser with new one based on DMR >> Streaming API >> * DMR parsing will be times faster with old model based API >> * new DMR streaming API is highly memory efficient and really very fast > Nice results in attached spreadsheets. > >> One example on how to use new DMR streaming API can be seen here [3]. >> >> I believe this new DMR Streaming API will become very handy for many of us >> because it opens new opportunities to decrease memory and CPU usage in >> our core. >> >> At the moment in current prototype [4] I didn't touch DMR object model >> writing yet >> because new DMR Streaming API does not (and most probably will not) >> support pretty print feature >> (because of its focus on speed and efficiency). >> But I'm considering I might fix the object model writing flow when >> pretty print is off. >> Fixing it would speed it up significantly. Any objections? > I think pretty print feature is need, at least in CLI for stuff like ':read-resource(recursive=true)' This is still done by the DOM-style API, correct Richard?

(eom) > Rostislav > >> As a final note today I run few benchmarks (see attachments). >> Here are some outcomes from benchmark results in short: >> * Writing small DMR structures in DMR format is 2,4 times faster with >> new DMR streaming API >> * Writing small DMR structures in JSON format is 2,6 times faster with >> new DMR streaming API >> * Reading small DMR structures in DMR format is 3,9 times faster with >> old DMR object model API >> * Reading small DMR structures in JSON format is 3,7 times faster with >> old DMR object model API >> * Reading small DMR structures in DMR format is 5 times faster with >> new DMR streaming API >> * Reading small DMR structures in JSON format is 4,4 times faster with >> new DMR streaming API >> * Reading big DMR structures in DMR format is 5,2 times faster with >> old DMR object model API >> * Reading big DMR structures in JSON format is 6 times faster with old >> DMR object model API >> * Reading big DMR structures in DMR format is 7,6 times faster with >> new DMR streaming API >> * Reading big DMR structures in JSON format is 8,8 times faster with >> new DMR streaming API >> >> PS: Hopefully new DMR streaming API will seamlessly integrate with GWT >> (used in our console). >> >> [1] >> https://github.com/ropalka/jboss-dmr/tree/DMR-9/src/main/java/org/jboss/d... >> [2] https://issues.jboss.org/browse/DMR-9 >> [3] >> https://github.com/ropalka/jboss-dmr/blob/DMR-9/src/main/java/org/jboss/d... >> [4] https://github.com/ropalka/jboss-dmr/commits/DMR-9 >> >> Regards, >> >> -- >> Richard Opalka >> Principal Software Engineer >> JBoss by Red Hat >> Mobile: +420 731 186 942 >> >> >> _______________________________________________ >> wildfly-dev mailing list >> wildfly-dev(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/wildfly-dev > _______________________________________________ > wildfly-dev mailing list > wildfly-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/wildfly-dev >