if (parallel) {
                stream.parallel();
            }
            final SuggestItem[] array = stream
                    .flatMap(queryLog -> contentsParser
                            .parseQueryLog(queryLog, supportedFields, tagFieldNames, roleFieldName, readingConverter, normalizer).stream())
                    .toArray(n -> new SuggestItem[n]);
            final long parseTime = System.currentTimeMillis();