We use `totalMetrics` with a `startTimeInNanos` and a call to `postIngest` to track the 'total time' that ingest is running for a given document. You can imagine it's a little stopwatch that we start and stop. Unfortunately, I think we're stopping the stopwatch just a little too soon, on the start side, we include the time spent transforming the document into an `IngestDocument`, but we do not include the (non-negligible) time transforming from an `IngestDocument` after the pipeline logic has run.

That is, the call to `sourceAsMap` is included:

https://github.com/elastic/elasticsearch/blob/d03664f84f15dcfcb900cf2d43121ca9d89bdda8/server/src/main/java/org/elasticsearch/ingest/IngestService.java#L905

But the call to `source` is not:

https://github.com/elastic/elasticsearch/blob/d03664f84f15dcfcb900cf2d43121ca9d89bdda8/server/src/main/java/org/elasticsearch/ingest/IngestService.java#L948

The consequence of this is that the `total` ingest stats doesn't actually reflect the true time spent in ingest code:

```
GET _nodes/stats?filter_path=nodes.*.ingest
{
  "nodes" : {
    "Aysm6ztIRne2ES5ktyuqtw" : {
      "ingest" : {
        "total" : {
          "count" : 1,
          "time_in_millis" : 110, <--- this should be a little higher than it is
```
server/src/main/java/org/elasticsearch/ingest/IngestService.java
defaultPipelineIndices.stream().sorted().limit(3).collect(Collectors.joining(","))
                        )
                        : Strings.EMPTY,
                    defaultPipelineIndices.size() > 0 && finalPipelineIndices.size() > 0 ? " and " : Strings.EMPTY,
                    finalPipelineIndices.size() > 0
                        ? String.format(
                            Locale.ROOT,
                            "the final pipeline for %s index(es) including [%s]",
                            finalPipelineIndices.size(),
                            finalPipelineIndices.stream().sorted().limit(3).collect(Collectors.joining(","))
                        )
                        : Strings.EMPTY
                )
            );
        }
    }
    /**
     * @return pipeline configuration specified by id. If multiple ids or wildcards are specified multiple pipelines
     * may be returned
     */
    
    
    public static List<PipelineConfiguration> getPipelines(ClusterState clusterState, String... ids) {
        IngestMetadata ingestMetadata = clusterState.getMetadata().custom(IngestMetadata.TYPE);
        return innerGetPipelines(ingestMetadata, ids);
    }
    static List<PipelineConfiguration> innerGetPipelines(IngestMetadata ingestMetadata, String... ids) {
        if (ingestMetadata == null) {
            return Collections.emptyList();
        }