Result

Query without federated query engine:

Query\time(ms)	time 1	time 2	time 3	time 4	time 5	average*
q1'	914	880	882	878	877	879
q2'	2490	2498	2496	2497	5907	2495
q4"	14576	13799	13630	14630	13621	13907

Query 1':

Returned in several seconds.

Query 1":

error: Virtuoso RDFZZ Error DB.DBA.SPARQL_REXEC(' http://pharmgkb.bio2rdf.org/sparql', ...) has received result with unexpected variable name 'stubvar11'

Query 2':

Returned in several seconds.

Query 2":

error: Virtuoso S1T00 Error SR171: Transaction timed out

Query 3' & 3":

timed out

Query 4': Virtuoso 42000 Error SR596: Unable to place abnormally long XML tree, 2097151 elements are above 2097151 limit

Query 4":

returned results in several seconds.

Query 5' and 5":

Timed out.

FedX:

q2" returned 20 results.

Query\time(ms)	time 1	time 2	time 3	time 4	time 5	average*
q1'	106410	105679	113187	106585	108083	106689
q1"	108018	105739	106222	106766	108083	106345
q2'	3928	5202	3833	4716	3905	4096
q2"	112592	107546	108052	109186	108462	108312
q3'	106219	105742	105523	105226	105091	105644
q3"	108731	106289	106044	106452	105464	106062
q4'	19828	19664	19421	20903	20827	19935
q4"	20195	19827	19605	20637	19793	19855
q5'	127694	124494	167313	171808	155685	143797
q5"	142342	157255	155935	160175	131282	146704

ANAPSID

unknown text error.

cannot find reserved word for "service"

 https://github.com/anapsid/anapsid/blob/master/ANAPSID/Decomposer/parseQuery.py