Keep track of time required to load builds

Dependencies

• [2] ZK76B5ZZ Load the queue in order of global priority
• [*] 24BMQDZA Start of single-process hydra-queue-runner
• [*] PLOZBRTR Add command ‘hydra-queue-runner --status’ to show current status
• [*] MHVIT4JY Split hydra-queue-runner.cc more
• [*] 46ADBTMQ Start steps in order of ascending build ID
• [*] HJOEIMLR Refactor

Change contents

• edit in src/hydra-queue-runner/hydra-queue-runner.cc at line 551
  [5.1270]

  [5.1270]
  + root.attr("buildReadTimeMs", buildReadTimeMs);

  + root.attr("buildReadTimeAvgMs", nrBuildsRead == 0 ? 0.0 : (float) buildReadTimeMs / nrBuildsRead);
• edit in src/hydra-queue-runner/queue-monitor.cc at line 249
  [2.989]

  [6.28097]
  +

  + auto now1 = std::chrono::steady_clock::now();
• edit in src/hydra-queue-runner/queue-monitor.cc at line 260
  [6.28327]

  [7.2400]
  +

  + auto now2 = std::chrono::steady_clock::now();
• edit in src/hydra-queue-runner/queue-monitor.cc at line 263
  [7.2401]

  [6.28328]
  + buildReadTimeMs += std::chrono::duration_cast<std::chrono::milliseconds>(now2 - now1).count();

  +
• edit in src/hydra-queue-runner/state.hh at line 297
  [8.5573]

  [8.5573]
  + counter buildReadTimeMs{0};