Hi Andre, The problem has been fixed [1]. A new snapshot is available [2]. BaseX 9.0.1 will probably be released around the end of April.
Best, Christian [1] https://github.com/BaseXdb/basex/commit/4500547038ff69b99d04751768ac328d5276eb6d [2] http://files.basex.org/releases/latest/ On Sat, Mar 31, 2018 at 5:10 PM, Christian Grün <christian.gr...@gmail.com> wrote: > Dear Andre, > > Thanks for your observations, which bear some similarity to what > another user reported in Github [1]. I’ll get back to you soon. > > Best, > Christian > > [1] https://github.com/BaseXdb/basex/issues/1553 > > > > On Fri, Mar 30, 2018 at 10:32 AM, andre weber <a...@gmx.de> wrote: >> Hi, >> >> with the new Version 9 I have encountered a strange performance issue: >> - Running a simple xpath-query is fast, as it is using the attribute-index. >> Execution time: 59.19 ms >> - Putting the same simple xpath-query into a function results in a very poor >> performance. No use of the attribute-index here. Execution time: 12578.55 ms >> >> There where no issues with that in the previous Versions 8.x >> >> Here’s the setup… >> >> xquery version "3.1"; >> >> declare function local:slow_query_here() as node()* >> { >> prof:time( >> db:open("mars","data“)/sec[ @isin = "FR0000125338" ] >> ) >> (: 12578.55 ms :) >> }; >> >> let $fast_query_here := >> prof:time( >> db:open("mars","data“)/sec[ @isin = "FR0000125338" ] >> ) >> (: 59.19 ms :) >> >> return local:slow_query_here() >> >> >> Here’s the query plan… >> <QueryPlan compiled="true" updating="false"> >> <GFLWOR type="element()*"> >> <Let type="element()*"> >> <Var name="$fast_query_here" id="0" type="element()*"/> >> <ProfTime name="time(value[,label])" type="element()*"> >> <CachedPath type="element()*"> >> <ValueAccess index="attribute" type="attribute()*"> >> <IndexStaticDb name="mars" database="mars"/> >> <Str type="xs:string">FR0000125338</Str> >> </ValueAccess> >> <IterStep axis="self" test="*:base_isin" type="attribute()*"/> >> <CachedStep axis="parent" test="*:option" type="element()*"> >> <CachedPath> >> <IterStep axis="parent" test="*:option_list" type="element()*"/> >> <IterStep axis="parent" test="*:finance" type="element()*"/> >> <IterStep axis="parent" test="document-node()" >> type="document-node()*"/> >> </CachedPath> >> </CachedStep> >> </CachedPath> >> </ProfTime> >> </Let> >> <ProfTime name="time(value[,label])" type="element()*"> >> <CachedPath type="element()*" database="mars"> >> <DBNode database="mars" pre="0" type="document-node()"/> >> <IterStep axis="descendant" test="*:option_list" type="element()*"/> >> <IterStep axis="child" test="*:option" type="element()*"> >> <CmpSimpleG op="=" type="xs:boolean" size="1"> >> <CachedPath type="attribute()?"> >> <IterStep axis="attribute" test="*:base_isin" >> type="attribute()?"/> >> </CachedPath> >> <Str type="xs:string">FR0000125338</Str> >> </CmpSimpleG> >> </IterStep> >> </CachedPath> >> </ProfTime> >> </GFLWOR> >> </QueryPlan> >> >> Any idea what’s causing the performance drop? >> >> Thank you for your thoughts! >> Andre
