private void handleBranchTag()

in core/src/main/java/org/adoptopenjdk/jitwatch/report/suggestion/SuggestionWalker.java [473:546]
64 lines of code
13 McCabe index (conditional complexity)

	private void handleBranchTag(Map<String, String> attrs, int currentBytecode, IMetaMember caller)
	{
		String countStr = attrs.get(ATTR_BRANCH_COUNT);
		String probStr = attrs.get(ATTR_BRANCH_PROB);

		long count = 0;
		double probability = 0.0;

		if (countStr != null)
		{
			try
			{
				count = (long) ParseUtil.parseLocaleSafeDouble(countStr);
			}
			catch (NumberFormatException nfe)
			{
				logger.error("Couldn't parse branch tag attribute {}", countStr, nfe);
			}
		}

		if (probStr != null)
		{
			if (BRANCH_TAKEN_NEVER.equalsIgnoreCase(probStr) || BRANCH_TAKEN_MIN.equalsIgnoreCase(probStr))
			{
				probability = 0;
			}
			else if (BRANCH_TAKEN_ALWAYS.equalsIgnoreCase(probStr) || BRANCH_TAKEN_MAX.equalsIgnoreCase(probStr))
			{
				probability = 1;
			}
			else
			{
				try
				{
					probability = ParseUtil.parseLocaleSafeDouble(probStr);
				}
				catch (NumberFormatException nfe)
				{
					logger.error("Unrecognised branch probability: {}", probStr, nfe);
				}
			}
		}

		double score = 0;

		if (probability > 0.45 && probability < 0.55 && count >= MIN_BRANCH_INVOCATIONS)
		{
			score = scoreMap.get(REASON_UNCERTAIN_BRANCH);

			score *= count;
		}

		if (score > 0)
		{
			StringBuilder reasonBuilder = new StringBuilder();

			reasonBuilder.append("Method contains an unpredictable branch at bytecode ");
			reasonBuilder.append(currentBytecode);
			reasonBuilder.append(" that was observed ");
			reasonBuilder.append(count);
			reasonBuilder.append(" times and is taken with probability ");
			reasonBuilder.append(probability);
			reasonBuilder.append(
					".\nIt may be possbile to modify the branch (for example by sorting a Collection before iterating) to make it more predictable.");

			Report suggestion = new Report(caller, compilationIndex, currentBytecode, reasonBuilder.toString(), ReportType.BRANCH,
					(int) Math.ceil(score));

			if (!reportList.contains(suggestion))
			{
				reportList.add(suggestion);
			}
		}
	}