if jenkins user lookup is expensive, requesting changelogs can place undue burden on the master

"Handling GET /a_master/job/a_folder/job/a_job/branch/master/5/wfapi/changesets from 10.41.80.190 : RequestHandlerThread[#466] / waiting for hudson.remoting.Channel@1aed37e6:OperationsCenter at http://JOC_URL" #32037 daemon prio=5 os_prio=0 tid=0x00007fbdd6db3800 nid=0xa34a in Object.wait() [0x00007fbd99dca000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    at hudson.remoting.Request.call(Request.java:147)
    - locked <0x00000007271f3470> (a hudson.remoting.UserRequest)
    at hudson.remoting.Channel.call(Channel.java:780)
    at hudson.remoting.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:250)
    at com.sun.proxy.$Proxy84.loadUserByUsername(Unknown Source)
    at com.cloudbees.opscenter.security.OperationsCenterSecurityRealm.loadUserByUsername(OperationsCenterSecurityRealm.java:201)
    at hudson.model.User$UserIDCanonicalIdResolver.resolveCanonicalId(User.java:1049)
    at hudson.model.User.get(User.java:395)
    at hudson.model.User.get(User.java:364)
    at hudson.plugins.git.GitChangeSet.findOrCreateUser(GitChangeSet.java:374)
    at hudson.plugins.git.GitChangeSet.getAuthor(GitChangeSet.java:435)
    at com.cloudbees.workflow.rest.external.ChangeSetExt.mapFields(ChangeSetExt.java:176)
    at com.cloudbees.workflow.rest.external.ChangeSetExt.create(ChangeSetExt.java:151)
    at com.cloudbees.workflow.rest.endpoints.RunAPI.doChangesets(RunAPI.java:112)
    at sun.reflect.GeneratedMethodAccessor758.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:298)
    at com.cloudbees.workflow.util.ServeJson$Processor.invoke(ServeJson.java:29)
    at org.kohsuke.stapler.Function$InterceptedFunction.invoke(Function.java:399)