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Performance Tab Options

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Performance Tab Options Performance Tab Options

• Incremental analysi osptions s options control the incremental analysis feature, which is described in Running Flow Analysis in Incremental Mode. Available options are:
  • Enable incremental analysis: Determines whether incremental analysis is used.
  • Compact incremental caches every [days]: Determines how often compactization of incremental caches is  run. Incremental analysis is optimized for speed; although Flow Analysis strives to always keep cache sizes small and remove unnecessary data, source code changes may result in these caches containing some data that will no longer be used. Compactization, which is run regularly as defined by this parameter, removes all outdated data. More precisely, if the time that has elapsed since the previous compactization is greater than the number of days specified for this option, compactization is performed immediately after the incremental run of Flow Analysis
  • Clear cache: Clears the incremental analysis cache for the current workspace. After the cache is cleaned the first run of incremental analysis on the workspace will require complete analysis of the code base.
• Depth of analysis options determine the depth of Flow Analysis analysis. Deeper analysis means more violations are found. However, the trade off of deeper analysis is slower performance and (slightly) increased memory consumption. Available options are:
  • shallowest (fastest): Finds only the most obvious problems in the source code. It is limited to cases where the cause of the problem is located close to the code where the problem occurs. The execution paths of violations found by this type of analysis normally span several lines of code in a single function. Only rarely will they span more than 3 function calls.
  • shallow (fast): Like the "shallowest" analysis type, finds only the most obvious problems in the source code. However, it produces a greater overall number of findings and allows for examination of somewhat longer execution paths.
  • standard: Finds many complicated problems with execution paths containing tens of elements. Standard analysis goes beyond shallow analysis and also looks for more complicated problems, which can occur because of bad flow in a single function or due to improper interaction between different functions in different parts of the analyzed project. Violations found by this type of analysis often reveal non-trivial bugs in the analyzed source code and often span tens of lines of code.
  • deep (slow): Allows for detection of a greater number of problems of the same complexity and nature as those defined for 'standard' depth. This type of analysis is slower than the standard one.
  • thorough (slower): Finds more complicated problems. This type of analysis will perform a thorough scan of the code base; this requires more time, but will uncover many very complicated problems whose violation paths can span more than a hundred lines of code in different parts of the scanned application. This option is recommended for nightly runs.
• Strategy for timeout options allow you to configure your timeout strategy ensure to the analysis completes within a reasonable time. Available options are:
  
  • time: Analysis of the given hotspot is stopped after spending the defined amount of time on it. Note: in some cases, using this option can result in a slightly unstable number of violations being reported.
  • instructions: Analysis of the given hotspot is stopped after executing the defined number of Flow Analysis instructions.Note: to determine the proper number of instructions to be set up for your environment, review information about timeouts in the Setup Problems section of the generated report.
  • off: No timeout. Note: using this option may require significantly more time to finish the analysis.
  The default timeout option is time set to 60 seconds. To get information about the Flow Analysis timeouts that occurred during the analysis, review the Setup Problems section of the report generated after the analysis.

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  enable_swapping enable_swapping

  Enable swapping of analysis data to disk: Enabled by default. Flow Analysis writes to disk the data necessary for analysis. Swapping is done in a similar process as incremental analysis, as well as uses the same persistent storage.You can disable this option, which may result in faster analysis, if you are running Flow Analysis analysis on small to moderate size projects that do not require a lot of memory or when plenty of memory is available (for example, for 64-bit systems). For description of the swapping feature please refer to the Running Flow Analysis with Swapping of Analysis Data Enabled section.

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