Decrease Issue History response size

[Konstantinos Zafeiris]

Hello everyone,
I am developing a python app to better graph team workloads based on sprints.

For the development of a feature I need to check the issues's changelog to check whether or not the issue has been moved between sprints or not.

The request I am currently using is the following.

API_GET_SPRINT_ISSUES = "https://example.com/rest/agile/1.0/sprint/{}/issue"
def get_sprint_issues(authenticationToken, sprintId):

    headers = {"Accept": "application/json",
               "Authorization" : "Basic %s" % authenticationToken.decode()}

    params = {"expand":"changelog",
              "fields" : ["summary","assignee","created","duedate",
                      "timetracking","status","worklog"],
              "changelog":"histories",}


    response = requests.get(API_GET_SPRINT_ISSUES.format(sprintId), 
                            headers = headers ,verify = True,params=params)
    return ujson.loads(response.content)

In this way I can fetch only the specific data I need from the "fields", but the changelog will always be returned at full,(the "histories" parameter seems to be completely ignored), including a lot of unnecessary data that makes the response time a lot slower.

My question is, is there any other way to get the previous sprints of an issue?
If not, then can I somehow request only specific fields from the changelog so as to limit the response size (specifically I only need the "fieldType", "fromString", "toString" fields).
Thank you all in advance.