{"title":"SIMD编解码器的真空和原位评价","authors":"A. Trotman, Jimmy J. Lin","doi":"10.1145/3015022.3015023","DOIUrl":null,"url":null,"abstract":"The size of a search engine index and the time to search are inextricably related through the compression codec. This investigation examines this tradeoff using several relatively unexplored SIMD-based codecs including QMX, TurboPackV, and TurboPFor. It uses (the non-SIMD) OPTPFor as a baseline. Four new variants of QMX are introduced and also compared. Those variants include optimizations for space and for time. Experiments were conducted on the TREC .gov2 collection using topics 701-850, in crawl order and in URL order. The results suggest that there is very little difference between these codecs, but that the reference implementation of QMX performs well.","PeriodicalId":334601,"journal":{"name":"Proceedings of the 21st Australasian Document Computing Symposium","volume":"51 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2016-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"10","resultStr":"{\"title\":\"In Vacuo and In Situ Evaluation of SIMD Codecs\",\"authors\":\"A. Trotman, Jimmy J. Lin\",\"doi\":\"10.1145/3015022.3015023\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The size of a search engine index and the time to search are inextricably related through the compression codec. This investigation examines this tradeoff using several relatively unexplored SIMD-based codecs including QMX, TurboPackV, and TurboPFor. It uses (the non-SIMD) OPTPFor as a baseline. Four new variants of QMX are introduced and also compared. Those variants include optimizations for space and for time. Experiments were conducted on the TREC .gov2 collection using topics 701-850, in crawl order and in URL order. The results suggest that there is very little difference between these codecs, but that the reference implementation of QMX performs well.\",\"PeriodicalId\":334601,\"journal\":{\"name\":\"Proceedings of the 21st Australasian Document Computing Symposium\",\"volume\":\"51 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2016-12-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"10\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings of the 21st Australasian Document Computing Symposium\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1145/3015022.3015023\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the 21st Australasian Document Computing Symposium","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1145/3015022.3015023","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
The size of a search engine index and the time to search are inextricably related through the compression codec. This investigation examines this tradeoff using several relatively unexplored SIMD-based codecs including QMX, TurboPackV, and TurboPFor. It uses (the non-SIMD) OPTPFor as a baseline. Four new variants of QMX are introduced and also compared. Those variants include optimizations for space and for time. Experiments were conducted on the TREC .gov2 collection using topics 701-850, in crawl order and in URL order. The results suggest that there is very little difference between these codecs, but that the reference implementation of QMX performs well.
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