Performance degradation in creating managed users with roles.

> request count                                      27696 (OK=27696  KO=0     )
> min response time                                    181 (OK=181    KO=-     )
> max response time                                    562 (OK=562    KO=-     )
> mean response time                                   325 (OK=325    KO=-     )
> std deviation                                         26 (OK=26     KO=-     )
> response time 50th percentile                        322 (OK=322    KO=-     )
> response time 95th percentile                        368 (OK=368    KO=-     )
> response time 99th percentile                        403 (OK=403    KO=-     )
> response time 99.9th percentile                      506 (OK=506    KO=-     )
> mean requests/sec                                 92.013 (OK=92.013 KO=-     )
---- Response Time Distribution ------------------------------------------------
> t < 800 ms                                         27696 (100%)
> 800 ms < t < 1200 ms                                   0 (  0%)
> t > 1200 ms                                            0 (  0%)
> failed                                                 0 (  0%)

> request count                                      24893 (OK=24893  KO=0     )
> min response time                                    164 (OK=164    KO=-     )
> max response time                                   1018 (OK=1018   KO=-     )
> mean response time                                   361 (OK=361    KO=-     )
> std deviation                                         28 (OK=28     KO=-     )
> response time 50th percentile                        359 (OK=359    KO=-     )
> response time 95th percentile                        404 (OK=404    KO=-     )
> response time 99th percentile                        435 (OK=435    KO=-     )
> response time 99.9th percentile                      536 (OK=536    KO=-     )
> mean requests/sec                                 82.701 (OK=82.701 KO=-     )
---- Response Time Distribution ------------------------------------------------
> t < 800 ms                                         24886 (100%)
> 800 ms < t < 1200 ms                                   7 (  0%)
> t > 1200 ms                                            0 (  0%)
> failed                                                 0 (  0%)

STRESS_TEST_CONCURRENCY                : "30",
            STRESS_TEST_DURATION                   : "300",
            OPENIDM_VERSION                   : "7.0.0-SNAPSHOT",
            OPENIDM_JAVA_HOME                 : "/usr/java/jdk11",
            OPENIDM_REPO_TYPE                 : "mysql",
            STRESS_PRELOAD_USERS             : "20",
            STRESS_PRELOAD_DURATION          : "300",
            STRESS_ROLES_PER_USER            : "10",
            STRESS_NUMBER_OF_ROLES           : "80",
            STRESS_NUMBER_OF_ASSIGNMENTS     : "1",
            STRESS_ASSIGNMENTS_PER_ROLE      : "1",
            STRESS_POSTALCODE_NULL_RECORDS   : "0",
            OPENIDM_JAVA_ARGS                 : "-Xms6g -Xmx6g",
            PRINT_GC_DETAILS                  : "True",
            OPENIDM_ENABLE_JETTY_CONFIG       : "False",
            OPENIDM_ENABLE_METRICS            : "False",

run-pybot.py -v -c perf -s relationship.CreateManUsersWithRolesManager OpenIDM