Allon Mureinik has submitted this change and it was merged. Change subject: core: Improve performance of GUID constructor ...................................................................... core: Improve performance of GUID constructor The GUID constructor that takes an array of bytes as parameter creates an intermediate string representation that is then immediately discarded. This patch changes the constructor to build the GUID without the intermediate string, borrowing the algorithm from a private constructor of the UUID class. In my environment this reduces the time to run the constructor from approx 1500ns to approx 75ns. It should also have a positive effect in garbage collection, as it doesn't generate the intermediate string. The overall effect in performance is probably not that big, but every bit helps. Change-Id: Ia76c3d9e7ee7594d6d925551320635a20399f11f Signed-off-by: Juan Hernandez <juan.hernandez(a)redhat.com&gt; --- M backend/manager/modules/compat/src/main/java/org/ovirt/engine/core/compat/Guid.java 1 file changed, 25 insertions(+), 60 deletions(-) Approvals: Allon Mureinik: Verified; Looks good to me, approved -- To view, visit http://gerrit.ovirt.org/16421 To unsubscribe, visit http://gerrit.ovirt.org/settings Gerrit-MessageType: merged Gerrit-Change-Id: Ia76c3d9e7ee7594d6d925551320635a20399f11f Gerrit-PatchSet: 3 Gerrit-Project: ovirt-engine Gerrit-Branch: master Gerrit-Owner: Juan Hernandez <juan.hernandez(a)redhat.com&gt; Gerrit-Reviewer: Allon Mureinik <amureini(a)redhat.com&gt; Gerrit-Reviewer: Liran Zelkha <liran.zelkha(a)gmail.com&gt; Gerrit-Reviewer: oVirt Jenkins CI Server