From bc7a162f20a62d4f2ac0ba4908e67689e1ee2c5c Mon Sep 17 00:00:00 2001
From: Paul Buetow <paul@buetow.org>
Date: Fri, 6 Mar 2026 16:46:37 +0200
Subject: refactor: make livetrie caller-owned for pair recycling (task 382)

---
 internal/flamegraph/livetrie.go        |  3 +--
 internal/ior.go                        |  1 +
 internal/tui/flamegraph/bench_test.go  |  1 +
 internal/tui/flamegraph/stress_test.go | 12 ++++++++----
 4 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/internal/flamegraph/livetrie.go b/internal/flamegraph/livetrie.go
index 794b790..600e404 100644
--- a/internal/flamegraph/livetrie.go
+++ b/internal/flamegraph/livetrie.go
@@ -77,11 +77,10 @@ func (lt *LiveTrie) invalidateCache() {
 	lt.cacheMu.Unlock()
 }
 
-// Ingest adds one event pair into the live trie and recycles the pair.
+// Ingest adds one event pair into the live trie.
 func (lt *LiveTrie) Ingest(ep *event.Pair) {
 	record := eventPairToRecord(ep)
 	lt.AddRecord(record)
-	ep.Recycle()
 }
 
 // AddRecord adds one already-decoded flamegraph record into the live trie.
diff --git a/internal/ior.go b/internal/ior.go
index 2a5d1b9..5ebc360 100644
--- a/internal/ior.go
+++ b/internal/ior.go
@@ -203,6 +203,7 @@ func tuiTraceStarterFromRunTrace(
 					engine.Ingest(ep)
 					streamEvents <- eventstream.NewStreamEvent(ep.EnterEv.GetTime(), ep)
 					liveTrie.Ingest(ep)
+					ep.Recycle()
 				}
 				el.warningCb = func(message string) {
 					// Drop warning notifications if the stream channel is saturated.
diff --git a/internal/tui/flamegraph/bench_test.go b/internal/tui/flamegraph/bench_test.go
index 05c6526..33d77d1 100644
--- a/internal/tui/flamegraph/bench_test.go
+++ b/internal/tui/flamegraph/bench_test.go
@@ -298,6 +298,7 @@ func BenchmarkLiveTrieIngestAndSnapshot(b *testing.B) {
 						buildBenchmarkPath(8, 6, eventIdx),
 					)
 					liveTrie.Ingest(pair)
+					pair.Recycle()
 				}
 
 				payload, _ := liveTrie.SnapshotJSON()
diff --git a/internal/tui/flamegraph/stress_test.go b/internal/tui/flamegraph/stress_test.go
index d2bd74a..e53e4d5 100644
--- a/internal/tui/flamegraph/stress_test.go
+++ b/internal/tui/flamegraph/stress_test.go
@@ -82,13 +82,15 @@ func TestStressHighEventRate(t *testing.T) {
 				if seed%2 == 0 {
 					traceID = types.SYS_ENTER_WRITE
 				}
-				liveTrie.Ingest(newBenchmarkPair(
+				pair := newBenchmarkPair(
 					fmt.Sprintf("worker-%d", worker),
 					traceID,
 					uint32(1000+worker),
 					uint32(200000+seed),
 					buildBenchmarkPath(6, 3, seed),
-				))
+				)
+				liveTrie.Ingest(pair)
+				pair.Recycle()
 			}
 		}()
 	}
@@ -221,12 +223,14 @@ func ingestStressEvents(liveTrie *coreflamegraph.LiveTrie, count, seedBase int)
 		} else if seed%2 == 0 {
 			traceID = types.SYS_ENTER_WRITE
 		}
-		liveTrie.Ingest(newBenchmarkPair(
+		pair := newBenchmarkPair(
 			fmt.Sprintf("stress-%d", seed%8),
 			traceID,
 			uint32(1200+(seed%64)),
 			uint32(300000+seed),
 			buildBenchmarkPath(9, 5, seed),
-		))
+		)
+		liveTrie.Ingest(pair)
+		pair.Recycle()
 	}
 }
-- 
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