# Main Thread Garbage Collection

This report contains URLs and the time spent on garbage collection activities on the main thread. Garbage collection involves reclaiming memory occupied by objects that are no longer in use by the application.

**Priority**: None

**Impact**: Neutral

## How to fetch the data for this report template

You will need to run a crawl for report template to generate report. When report has been generated and you have
crawl id you can fetch data for the report using the following query:


```graphql
query GetReportStatForCrawl(
      $crawlId: ObjectID!
      $reportTemplateCode: String!
      $after: String
     ) {
        getReportStat(
          input: {crawlId: $crawlId, reportTemplateCode: $reportTemplateCode}
        ) {
          crawlSiteSpeedAuditItems(after: $after, reportType: Basic) {
            nodes {
              opportunityDigest
              element
              url
              wastedSecs
              pageviews
              productOfWastedSecsAndPageviews
              auditResult
            }
            totalCount
            pageInfo {
              endCursor
              hasNextPage
            }
          }
       }
     }
```

**Variables:**
```json
{"crawlId":"TjAwNUNyYXdsNDAwMA","reportTemplateCode":"mainthread_garbage_collection_items"}
```