// Test with null
        searchRenderData.setExecTime(null);
        assertNull(searchRenderData.getExecTime());

        // Test with empty string
        searchRenderData.setExecTime("");
        assertEquals("", searchRenderData.getExecTime());

        // Test with formatted time string
        searchRenderData.setExecTime("0.123 sec");
        assertEquals("0.123 sec", searchRenderData.getExecTime());

                buf.append("&hq=").append(LaFunctions.u(q));
            });
            data.setAppendHighlightParams(buf.toString());
        }

        queryResponseList.setExecTime(systemHelper.getCurrentTimeAsLong() - startTime);
        final NumberFormat nf = NumberFormat.getInstance(params.getLocale());
        nf.setMaximumIntegerDigits(2);
        nf.setMaximumFractionDigits(2);