ommit.timestamp + ' committed by @' + data.commit.committer.username + '\n';
                  },
                  label: item => {
                    let label = item.value;
                    const { range, unit } = dataset[item.index].bench;
                    label += ' ' + unit;
                    if (range) {
                      label += ' (' + range + ')';
                    }
                    return label;
                  },
                  afterLabel: item => {
                    co