This workflow models 50 nodes in a single lane as a parser stress test.

Full FlowZap Code

laneA { # Lanea
  n1: circle label:"Start Max Nodes"
  n3: rectangle label:"Max Nodes step 3"
  n5: rectangle label:"Max Nodes step 5"
  n7: diamond label:"Max Nodes step 7"
  n9: rectangle label:"Max Nodes step 9"
  n11: rectangle label:"Max Nodes step 11"
  n13: rectangle label:"Max Nodes step 13"
  n15: diamond label:"Max Nodes step 15"
  n17: rectangle label:"Max Nodes step 17"
  n19: rectangle label:"Max Nodes step 19"
  n21: rectangle label:"Max Nodes step 21"
  n23: diamond label:"Max Nodes step 23"
  n25: rectangle label:"Max Nodes step 25"
  n27: rectangle label:"Max Nodes step 27"
  n29: rectangle label:"Max Nodes step 29"
  n31: diamond label:"Max Nodes step 31"
  n33: rectangle label:"Max Nodes step 33"
  n35: rectangle label:"Max Nodes step 35"
  n37: rectangle label:"Max Nodes step 37"
  n39: diamond label:"Max Nodes step 39"
  n41: rectangle label:"Max Nodes step 41"
  n43: rectangle label:"Max Nodes step 43"
  n45: rectangle label:"Max Nodes step 45"
  n47: diamond label:"Max Nodes step 47"
  n49: rectangle label:"Max Nodes step 49"

  n1.handle(bottom) -> laneB.n2.handle(top) [label="Success"]
  n3.handle(bottom) -> laneB.n4.handle(top)
  n5.handle(bottom) -> laneB.n6.handle(top)
  n7.handle(bottom) -> laneB.n8.handle(top) [label="Next"]
  n7.handle(right) -> laneB.n6.handle(right) [label="Retry/Rejected"]
  n9.handle(bottom) -> laneB.n10.handle(top)
  n11.handle(bottom) -> laneB.n12.handle(top)
  n13.handle(bottom) -> laneB.n14.handle(top) [label="Processed"]
  n15.handle(bottom) -> laneB.n16.handle(top)
  n15.handle(right) -> laneB.n14.handle(right) [label="Retry/Rejected"]
  n17.handle(bottom) -> laneB.n18.handle(top)
  n19.handle(bottom) -> laneB.n20.handle(top) [label="Valid"]
  n21.handle(bottom) -> laneB.n22.handle(top)
  n23.handle(bottom) -> laneB.n24.handle(top)
  n23.handle(right) -> laneB.n22.handle(right) [label="Retry/Rejected"]
  n25.handle(bottom) -> laneB.n26.handle(top) [label="Done"]
  n27.handle(bottom) -> laneB.n28.handle(top)
  n29.handle(bottom) -> laneB.n30.handle(top)
  n31.handle(bottom) -> laneB.n32.handle(top) [label="Success"]
  n31.handle(right) -> laneB.n30.handle(right) [label="Retry/Rejected"]
  n33.handle(bottom) -> laneB.n34.handle(top)
  n35.handle(bottom) -> laneB.n36.handle(top)
  n37.handle(bottom) -> laneB.n38.handle(top) [label="Next"]
  n39.handle(bottom) -> laneB.n40.handle(top)
  n39.handle(right) -> laneB.n38.handle(right) [label="Retry/Rejected"]
  n41.handle(bottom) -> laneB.n42.handle(top)
  n43.handle(bottom) -> laneB.n44.handle(top) [label="Processed"]
  n45.handle(bottom) -> laneB.n46.handle(top)
  n47.handle(bottom) -> laneB.n48.handle(top)
  n47.handle(right) -> laneB.n46.handle(right) [label="Retry/Rejected"]
  n49.handle(bottom) -> laneB.n50.handle(top) [label="Valid"]
}
laneB { # Laneb
  n2: rectangle label:"Max Nodes step 2"
  n4: rectangle label:"Max Nodes step 4"
  n6: rectangle label:"Max Nodes step 6"
  n8: rectangle label:"Max Nodes step 8"
  n10: rectangle label:"Max Nodes step 10"
  n12: rectangle label:"Max Nodes step 12"
  n14: rectangle label:"Max Nodes step 14"
  n16: rectangle label:"Max Nodes step 16"
  n18: rectangle label:"Max Nodes step 18"
  n20: rectangle label:"Max Nodes step 20"
  n22: rectangle label:"Max Nodes step 22"
  n24: rectangle label:"Max Nodes step 24"
  n26: rectangle label:"Max Nodes step 26"
  n28: rectangle label:"Max Nodes step 28"
  n30: rectangle label:"Max Nodes step 30"
  n32: rectangle label:"Max Nodes step 32"
  n34: rectangle label:"Max Nodes step 34"
  n36: rectangle label:"Max Nodes step 36"
  n38: rectangle label:"Max Nodes step 38"
  n40: rectangle label:"Max Nodes step 40"
  n42: rectangle label:"Max Nodes step 42"
  n44: rectangle label:"Max Nodes step 44"
  n46: rectangle label:"Max Nodes step 46"
  n48: rectangle label:"Max Nodes step 48"
  n50: circle label:"End Max Nodes"

  n2.handle(bottom) -> laneA.n3.handle(top)
  n4.handle(bottom) -> laneA.n5.handle(top) [label="Valid"]
  n6.handle(bottom) -> laneA.n7.handle(top)
  n8.handle(bottom) -> laneA.n9.handle(top)
  n10.handle(bottom) -> laneA.n11.handle(top) [label="Done"]
  n12.handle(bottom) -> laneA.n13.handle(top)
  n14.handle(bottom) -> laneA.n15.handle(top)
  n16.handle(bottom) -> laneA.n17.handle(top) [label="Success"]
  n18.handle(bottom) -> laneA.n19.handle(top)
  n20.handle(bottom) -> laneA.n21.handle(top)
  n22.handle(bottom) -> laneA.n23.handle(top) [label="Next"]
  n24.handle(bottom) -> laneA.n25.handle(top)
  n26.handle(bottom) -> laneA.n27.handle(top)
  n28.handle(bottom) -> laneA.n29.handle(top) [label="Processed"]
  n30.handle(bottom) -> laneA.n31.handle(top)
  n32.handle(bottom) -> laneA.n33.handle(top)
  n34.handle(bottom) -> laneA.n35.handle(top) [label="Valid"]
  n36.handle(bottom) -> laneA.n37.handle(top)
  n38.handle(bottom) -> laneA.n39.handle(top)
  n40.handle(bottom) -> laneA.n41.handle(top) [label="Done"]
  n42.handle(bottom) -> laneA.n43.handle(top)
  n44.handle(bottom) -> laneA.n45.handle(top)
  n46.handle(bottom) -> laneA.n47.handle(top) [label="Success"]
  n48.handle(bottom) -> laneA.n49.handle(top)
}

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