BreakTest 2026.07.10

BreakTest 2026.07.10 is a workflow, visualization, and scalability release
built from the changes since BreakTest 2026.07.08. It adds direct HAR import,
parallel ForEach execution, GUI-assisted updates, a richer View Results
listener, and several targeted runtime and desktop performance improvements.

Highlights

• Added a guided HAR import wizard for uncompressed .har recordings, with
  hostname filtering, request grouping, delay options, and automatic test-plan
  generation.
• Added optional parallel execution to the ForEach Controller, with a
  configurable maximum concurrency and lazy branch creation for very large
  collections.
• Expanded View Results with a table layout, selectable columns, response-time
  data, request/response sizes, URLs, filtering, and improved status icons.
• Reduced repeated test-tree traversal by caching parent-controller paths used
  by loop control actions.
• Added the HTTP request URL to the Sampler Result text view and made the
  initial test-plan pane width configurable.
• Added GUI-only automatic and manual checks for stable BreakTest releases,
  with verified download, post-exit installation, rollback, and restart.

HAR Import

• Added File > Import HAR... and a matching HAR toolbar action.
• Added guided steps for selecting a HAR file, choosing hostnames, and
  configuring import behavior.
• Added support for ignoring recorded error responses, continuing on error,
  adding request indexes, detecting dynamic URLs, and splitting transactions
  using recorded idle gaps.
• Added recorded, fixed, random, Gaussian, and disabled transaction-delay
  modes.
• Generated plans can include Transaction Controllers, Parallel Controllers
  for concurrent requests, HTTP Request Defaults, Cookie Managers, assertions,
  shared headers, and request-local headers.
• Preserved BreakTest HAR metadata so imported requests remain compatible with
  recorded-HAR inspection and repair workflows.
• Fixed reference and variable handling in imported requests.

Parallel ForEach And Runtime Performance

• Added Parallel execution and Maximum parallel executions options to
  the ForEach Controller.
• Branches are created only when a concurrency slot becomes available, so a
  million input values no longer require a million controller clones up front.
• Transaction-controller source mappings are scoped to each active branch and
  released with that branch, keeping retained execution state proportional to
  configured parallelism rather than total item count.
• Preserved branch-local ForEach output values while sharing the surrounding
  virtual-user context and honoring existing same-user iteration behavior.
• Added parent-path caching for loop actions that previously traversed the test
  tree repeatedly after errors or logical loop transitions.

Results And Desktop Experience

• Added Tree and Table modes to View Results, with table results above the
  detail pane and the existing tree/detail split retained in Tree mode.
• Added timestamp, time, latency, connect time, request size, response size,
  thread group, thread name, label, and URL columns with configurable
  visibility.
• Added filtering by thread group, thread name, and sampler label, including a
  table context-menu action for filtering to a selected thread.
• Fixed automatic scrolling and filter controls during live table refreshes.
• Added full-value tooltips for truncated table cells and numeric sorting for
  timing and size columns.
• Modernized success/failure icons and added HTTP URLs to the Sampler Result
  text tab.
• Set a stable startup width for the test-plan pane, configurable through
  jmeter.gui.testplan.width.

GUI Updates

• Added automatic stable-release checks in GUI mode, limited to once every 24
  hours by default, plus a manual Help > Check for Updates action.
• Added update notifications with links to the matching GitHub release notes.
• Downloads the expected binary ZIP and verifies its published SHA-512
  checksum and GitHub SHA-256 asset digest before installation.
• Installs through a post-exit helper so active JAR files are not replaced,
  rolls back failed replacements, and restarts BreakTest after success.
• Preserves user and system properties, third-party lib/ext plugins, and
  user-installed driver JARs during updates.
• Refuses source checkouts and malformed distributions, and confines archive
  extraction and installation paths to prevent traversal or symlink escapes.
• Update checks are disabled outside the GUI and can be configured through
  breaktest.update.check.enabled and breaktest.update.check.interval_hours.

Benchmarks And Tests

• Added high-capacity ForEach benchmarks covering active-window memory,
  representative sample payloads, and parent-mode Transaction Controllers.
• Added regression tests for lazy branch creation, bounded transaction mapping,
  branch-local variables, parent transactions, table sorting, filtering,
  automatic scrolling, URL display, and visualizer layout behavior.
• Expanded HAR conversion tests across grouping, headers, request bodies,
  delay modes, hostname filtering, and generated configuration elements.

Compatibility Notes

• Java 21 or later is still required.
• Existing JMeter-compatible JMX files remain supported where practical.
• Parallel ForEach execution is opt-in; existing ForEach Controllers remain
  sequential unless explicitly enabled.
• Automatic update checks run only in the GUI; command-line and non-GUI test
  execution do not contact the update service.
• This release uses the direct Git tag 2026.07.10 rather than a rel/...
  prefix.