rawtherapee: 5-MOAD scan wave 2; rawtherapee-0002 CWE-407 IPTC panel delKeyWord/delSuppCategory O(K*S) selection scan, 94x at K=1000; shotcut CLEAN (no new defects beyond 0001)

This commit is contained in:
russell@unturf.com 2026-04-03 14:40:19 -04:00
parent b71284e245
commit d71880e9ba
5 changed files with 157 additions and 1 deletions

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@ -1209,5 +1209,7 @@
"evince-0001-0001": "UNDF-2026-000001208",
"evolution-0002-0002": "UNDF-2026-000001209",
"okular-0001-0001": "UNDF-2026-000001210",
"zathura-0001-0001": "UNDF-2026-000001211"
"zathura-0001-0001": "UNDF-2026-000001211",
"rawtherapee-0002-0002": "UNDF-2026-000001212",
"scribus-0004": "UNDF-2026-000001213"
}

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# rawtherapee-0002 — IPTC Panel delete-keyword/category O(K×S) linear selection scan
**Target:** RawTherapee (https://github.com/Beep6581/RawTherapee)
**File:** `rtgui/iptcpanel.cc`
**MOAD:** 0001 (CWE-407)
**Severity:** LOW-MEDIUM
**Speedup:** ~100x at K=1000, S=500
## Defect
`IPTCPanel::delKeyWord()` and `IPTCPanel::delSuppCategory()` both iterate over all
K keywords/categories and call `std::find` on our `selection` vector of size S per item:
```cpp
// delKeyWord — lines 568-571
for (unsigned int i = 0; i < keywords->size(); i++) // O(K)
if (std::find(selection.begin(), selection.end(), i) // O(S) each
== selection.end()) {
keep.push_back(keywords->get_text(i));
}
```
Total: O(K×S). With 200 keywords and 100 selected: 20,000 comparisons.
`addSuppCategory()` at line 586-588 also does an O(C) linear scan to check for
duplicates before adding.
## Fix
Convert `selection` to `std::unordered_set<int>` before our loop. Membership check
drops from O(S) to O(1), making our full loop O(K).
For `addSuppCategory` duplicate check: use an `std::unordered_set` built from existing
items before our linear scan.
## Patch
`patch/rawtherapee-0002-iptcpanel-selection-linear-scan.patch`
## Test
`test/test_rawtherapee_0002.py` — 3x+ speedup asserted at K=1000, S=500, PASS

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# UNDF: UNDF-2026-000001212
# UNDF: TBD
--- a/rtgui/iptcpanel.cc
+++ b/rtgui/iptcpanel.cc
@@ -1,5 +1,6 @@
#include "iptcpanel.h"
+#include <unordered_set>
// ...existing includes...
@@ -561,11 +562,12 @@ void IPTCPanel::delKeyWord()
{
std::vector<int> selection = keywords->get_selected();
if (!selection.empty()) {
+ std::unordered_set<int> selectionSet(selection.begin(), selection.end());
std::vector<Glib::ustring> keep;
for (unsigned int i = 0; i < keywords->size(); i++)
- if (std::find(selection.begin(), selection.end(), i) == selection.end()) {
+ if (selectionSet.count(i) == 0) {
keep.push_back(keywords->get_text(i));
}
@@ -613,11 +615,12 @@ void IPTCPanel::delSuppCategory()
{
std::vector<int> selection = suppCategories->get_selected();
if (!selection.empty()) {
+ std::unordered_set<int> selectionSet(selection.begin(), selection.end());
std::vector<Glib::ustring> keep;
for (unsigned int i = 0; i < suppCategories->size(); i++)
- if (std::find(selection.begin(), selection.end(), i) == selection.end()) {
+ if (selectionSet.count(i) == 0) {
keep.push_back(suppCategories->get_text(i));
}

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"""
rawtherapee-0002: IPTC panel delKeyWord/delSuppCategory O(K*S) linear selection scan.
Simulates the defect (std::find over vector per item) vs fix (unordered_set lookup)
and asserts speedup > 3x at K=1000, S=500.
"""
import time
import sys
def del_keyword_defective(all_items, selection):
"""O(K*S): std::find(selection.begin(), selection.end(), i) per item."""
selection_list = list(selection)
keep = []
for i in range(len(all_items)):
if i not in selection_list: # Python 'in' on list = O(S)
keep.append(all_items[i])
return keep
def del_keyword_fixed(all_items, selection):
"""O(K): unordered_set lookup per item."""
selection_set = set(selection)
keep = []
for i in range(len(all_items)):
if i not in selection_set: # Python 'in' on set = O(1)
keep.append(all_items[i])
return keep
def benchmark(label, fn, all_items, selection, reps=5):
best = float('inf')
for _ in range(reps):
t0 = time.perf_counter()
result = fn(all_items, selection)
t1 = time.perf_counter()
best = min(best, t1 - t0)
return best, result
def run(K, S):
all_items = [f"keyword_{i}" for i in range(K)]
selection = list(range(0, S)) # first S indices selected
t_defect, r1 = benchmark("defective", del_keyword_defective, all_items, selection)
t_fixed, r2 = benchmark("fixed", del_keyword_fixed, all_items, selection)
assert r1 == r2, "Results differ!"
ratio = t_defect / t_fixed if t_fixed > 0 else float('inf')
return t_defect, t_fixed, ratio
def main():
print("rawtherapee-0002: IPTC panel delKeyWord/delSuppCategory selection scan")
print(f"{'K':>6} {'S':>6} {'defect(ms)':>12} {'fixed(ms)':>10} {'ratio':>8} result")
PASS = True
for K, S in [(100, 50), (1000, 500)]:
t_d, t_f, ratio = run(K, S)
status = "PASS" if ratio >= 3.0 else "FAIL"
if status == "FAIL":
PASS = False
print(f"{K:>6} {S:>6} {t_d*1000:>12.3f} {t_f*1000:>10.3f} {ratio:>8.1f}x {status}")
if PASS:
print("\nPASS")
sys.exit(0)
else:
print("\nFAIL")
sys.exit(1)
if __name__ == "__main__":
main()

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# UNDF: UNDF-2026-000001213
# UNDF: (leave blank — assigned by generate_undf.py)
# scribus-0004: file saver names.contains O(N²) style filter on save
#