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cloudflare/quiche

🥧 Savoury implementation of the QUIC transport protocol and HTTP/3

Rust★ 12,408+32 that day#5 on trending

Analyzed September 22, 2026 at cdf6105 (master) with jscpd 5.4.0 in 0.5s. Code duplication stayed at 14.32% across 2 appearances since Sep 20.

E34.6/100

Project health145,515 lines of code (L)

Duplication31

14.5% in rust, c, c-header, bash, javascript, perl

Dead coden/a

JavaScript, TypeScript and Python are under 5% of the code

Complexity39

69.4%

The score is jscpd's own --health model: markup, data and text left out, tests kept. The numbers below are the trending scan's.

14.32%duplicated code · 19,322 of 134,890 lines

1,547clones in code

207code files of 315 scanned

15.28%duplicated over all files · 1,752 clones

Most complex files

Dead code 100% unused · 1 findings

qlog-dancer/qlog-dancer-ui.jsunused-file

The code number leaves out tests, fixtures, docs, examples, data files, styles, translations and vendored code.

Largest clones in the code

112 lines in 2 placesrust3,605 tokens

quiche/src/packet.rs:1539–1650quiche/src/packet.rs:1916–2027

1539let mut pkt = [
1540    0xc0, 0x00, 0x00, 0x00, 0x01, 0x08, 0x83, 0x94, 0xc8, 0xf0, 0x3e,
1541    0x51, 0x57, 0x08, 0x00, 0x00, 0x44, 0x9e, 0x7b, 0x9a, 0xec, 0x34,
1542    0xd1, 0xb1, 0xc9, 0x8d, 0xd7, 0x68, 0x9f, 0xb8, 0xec, 0x11, 0xd2,
1543    0x42, 0xb1, 0x23, 0xdc, 0x9b, 0xd8, 0xba, 0xb9, 0x36, 0xb4, 0x7d,
1544    0x92, 0xec, 0x35, 0x6c, 0x0b, 0xab, 0x7d, 0xf5, 0x97, 0x6d, 0x27,
1545    0xcd, 0x44, 0x9f, 0x63, 0x30, 0x00, 0x99, 0xf3, 0x99, 0x1c, 0x26,
1546    0x0e, 0xc4, 0xc6, 0x0d, 0x17, 0xb3, 0x1f, 0x84, 0x29, 0x15, 0x7b,
1547    0xb3, 0x5a, 0x12, 0x82, 0xa6, 0x43, 0xa8, 0xd2, 0x26, 0x2c, 0xad,
1548    0x67, 0x50, 0x0c, 0xad, 0xb8, 0xe7, 0x37, 0x8c, 0x8e, 0xb7, 0x53,

First 10 of 112 lines.

84 lines in 2 placesrust2,749 tokens

quiche/src/packet.rs:1830–1913quiche/src/packet.rs:1830–1913

18300x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
18310x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
18320x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
18330x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
18340x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
18350x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
18360x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
18370x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
18380x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
18390x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

First 10 of 84 lines.

15 lines in 21 placesrust94 tokens

quiche/src/tests.rs:1263–1277quiche/src/tests.rs:6875–6889quiche/src/tests.rs:6950–6964quiche/src/tests.rs:7135–7149quiche/src/tests.rs:10097–10111and 16 more

1263fn stream_send_on_32bit_arch(
1264    #[values("cubic", "bbr2_gcongestion")] cc_algorithm_name: &str,
1265) {
1266    let mut config = Config::new(PROTOCOL_VERSION).unwrap();
1267    assert_eq!(config.set_cc_algorithm_name(cc_algorithm_name), Ok(()));
1268    config
1269        .load_cert_chain_from_pem_file("examples/cert.crt")
1270        .unwrap();
1271    config
1272        .load_priv_key_from_pem_file("examples/cert.key")

First 10 of 15 lines.

7 more

7 lines in 25 placesrust62 tokens
quiche/src/tests.rs:1412–1418 quiche/src/tests.rs:1450–1456 quiche/src/tests.rs:1534–1540 quiche/src/tests.rs:1565–1571 quiche/src/tests.rs:1595–1601and 20 more
9 lines in 17 placesrust62 tokens
quiche/src/tests.rs:630–638 quiche/src/tests.rs:799–807 quiche/src/tests.rs:1683–1691 quiche/src/tests.rs:1757–1765 quiche/src/tests.rs:5937–5945and 12 more
8 lines in 14 placesrust75 tokens
quiche/src/tests.rs:1298–1305 quiche/src/tests.rs:1828–1835 quiche/src/tests.rs:3217–3224 quiche/src/tests.rs:3294–3301 quiche/src/tests.rs:3543–3550and 9 more
29 lines in 2 placesrust771 tokens
quiche/src/packet.rs:1649–1677 quiche/src/packet.rs:1802–1830
7 lines in 10 placesrust79 tokens
quiche/src/frame.rs:1429–1435 quiche/src/frame.rs:1456–1462 quiche/src/frame.rs:1564–1570 quiche/src/frame.rs:1593–1599 quiche/src/frame.rs:1682–1688and 5 more
137 lines in 2 placesrust699 tokens
quiche/src/recovery/mod.rs:957–1093 quiche/src/recovery/mod.rs:1243–1377
24 lines in 4 placesrust225 tokens
quiche/src/frame.rs:1726–1749 quiche/src/frame.rs:1781–1804 quiche/src/frame.rs:1807–1830 quiche/src/frame.rs:1833–1856

Largest clones over all files, tests and data included

112 lines in 2 placesrust3,605 tokens

quiche/src/packet.rs:1539–1650quiche/src/packet.rs:1916–2027

1539let mut pkt = [
1540    0xc0, 0x00, 0x00, 0x00, 0x01, 0x08, 0x83, 0x94, 0xc8, 0xf0, 0x3e,
1541    0x51, 0x57, 0x08, 0x00, 0x00, 0x44, 0x9e, 0x7b, 0x9a, 0xec, 0x34,
1542    0xd1, 0xb1, 0xc9, 0x8d, 0xd7, 0x68, 0x9f, 0xb8, 0xec, 0x11, 0xd2,
1543    0x42, 0xb1, 0x23, 0xdc, 0x9b, 0xd8, 0xba, 0xb9, 0x36, 0xb4, 0x7d,
1544    0x92, 0xec, 0x35, 0x6c, 0x0b, 0xab, 0x7d, 0xf5, 0x97, 0x6d, 0x27,
1545    0xcd, 0x44, 0x9f, 0x63, 0x30, 0x00, 0x99, 0xf3, 0x99, 0x1c, 0x26,
1546    0x0e, 0xc4, 0xc6, 0x0d, 0x17, 0xb3, 0x1f, 0x84, 0x29, 0x15, 0x7b,
1547    0xb3, 0x5a, 0x12, 0x82, 0xa6, 0x43, 0xa8, 0xd2, 0x26, 0x2c, 0xad,
1548    0x67, 0x50, 0x0c, 0xad, 0xb8, 0xe7, 0x37, 0x8c, 0x8e, 0xb7, 0x53,

First 10 of 112 lines.

84 lines in 2 placesrust2,749 tokens

quiche/src/packet.rs:1830–1913quiche/src/packet.rs:1830–1913

18300x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
18310x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
18320x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
18330x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
18340x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
18350x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
18360x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
18370x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
18380x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
18390x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

First 10 of 84 lines.

15 lines in 21 placesrust94 tokens

quiche/src/tests.rs:1263–1277quiche/src/tests.rs:6875–6889quiche/src/tests.rs:6950–6964quiche/src/tests.rs:7135–7149quiche/src/tests.rs:10097–10111and 16 more

1263fn stream_send_on_32bit_arch(
1264    #[values("cubic", "bbr2_gcongestion")] cc_algorithm_name: &str,
1265) {
1266    let mut config = Config::new(PROTOCOL_VERSION).unwrap();
1267    assert_eq!(config.set_cc_algorithm_name(cc_algorithm_name), Ok(()));
1268    config
1269        .load_cert_chain_from_pem_file("examples/cert.crt")
1270        .unwrap();
1271    config
1272        .load_priv_key_from_pem_file("examples/cert.key")

First 10 of 15 lines.

7 lines in 25 placesrust62 tokens
quiche/src/tests.rs:1412–1418 quiche/src/tests.rs:1450–1456 quiche/src/tests.rs:1534–1540 quiche/src/tests.rs:1565–1571 quiche/src/tests.rs:1595–1601and 20 more
9 lines in 17 placesrust62 tokens
quiche/src/tests.rs:630–638 quiche/src/tests.rs:799–807 quiche/src/tests.rs:1683–1691 quiche/src/tests.rs:1757–1765 quiche/src/tests.rs:5937–5945and 12 more

By format, code only

Format	Files	Lines	Clones	Duplicated lines	Duplication
rust	191	131,611	1,546	19,313	14.67%
javascript	1	747	1	9	1.2%
c-header	1	1,297	0	0	0%
bash	13	1,061	0	0	0%
perl	1	174	0	0	0%

By format, all files

Format	Files	Lines	Clones	Duplicated lines	Duplication
rust	227	140,566	1,709	21,838	15.54%
c	4	1,959	30	1,041	53.14%
yaml	8	837	11	124	14.81%
markdown	23	2,559	1	7	0.27%
javascript	1	747	1	9	1.2%
c-header	1	1,297	0	0	0%
bash	18	1,142	0	0	0%
toml	16	814	0	0	0%
text	14	253	0	0	0%
markup	1	207	0	0	0%

Trending appearances

Day	Rank	Stars	Files	Lines	Clones	All files	Code	Health	Commit
Sep 22, 2026	#5	12,408 (+32)	315	150,689	1,752	15.28%	14.32%	E 34.6	`cdf6105`
Sep 20, 2026	#7	12,074 (+31)	315	150,688	1,752	15.28%	14.32%	E 34.6	`4d23d85`

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