54 lines
2 KiB
Diff
54 lines
2 KiB
Diff
# UNDF: UNDF-2026-000000087
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Fixes gorm-0001: callbacks.go getRIndex linear scan in sortCallbacks.
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--- a/callbacks.go
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+++ b/callbacks.go
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@@ DEFECT gorm-0001: callbacks.go:252 getRIndex() — O(N) linear scan
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-// getRIndex finds the last index of str in strs — O(N) linear scan.
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-func getRIndex(strs []string, str string) int {
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- for i := len(strs) - 1; i >= 0; i-- {
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- if strs[i] == str {
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- return i
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- }
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- }
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- return -1
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-}
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+// getRIndex — replaced by map-based O(1) lookup in sortCallbacks.
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+// FIX gorm-0001: getRIndex is no longer needed with map[string]int indices.
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func sortCallbacks(cs []*callback) (fns []*callback, err error) {
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- var (
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- names, sorted []string
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- sortCallback func(*callback) error
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- )
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- for _, c := range cs {
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- names = append(names, c.name)
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- }
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-
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- sortCallback = func(c *callback) error {
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- // ... multiple getRIndex(names, ...) and getRIndex(sorted, ...) calls
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- // Each is O(N); called 13 times per callback; O(N^2) total per sort.
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- }
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+ // FIX gorm-0001: build name→index map once for O(1) lookups in sort step.
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+ namesMap := make(map[string]int, len(cs))
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+ for i, c := range cs {
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+ namesMap[c.name] = i
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+ }
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+ sortedMap := make(map[string]int, len(cs))
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+ sortCallback = func(c *callback) error {
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+ if _, exists := sortedMap[c.name]; exists {
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+ return nil
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+ }
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+ // Replace all getRIndex(names, dep) calls with namesMap[dep] — O(1)
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+ // Replace all getRIndex(sorted, dep) calls with sortedMap[dep] — O(1)
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+ // ...
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+ }
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# BEFORE: getRIndex(names, x) = O(N) × 13 calls per callback × N callbacks = O(N²) per sort.
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# sortCallbacks is called on every Register()/Remove()/Replace().
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# For N=26 default callbacks: ~8,788 comparisons per startup.
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# AFTER: namesMap[x] = O(1). Full sort is O(N). Total startup: O(N²) → O(N log N).
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# Triggered by: GORM startup (init default callbacks), plugin registration, test setup.
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