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Performance measurements › x86_1 › kex-05 · system: x86_1 · arm_1

kex-05 Loom — performance on x86-64 (system x86_1)

Independent measurement following the structure of the NICCS x86 self-assessment guide, §3.5 (1)–(7). Not a submitter self-assessment.

1. Basic information

2. Assessment environment

item value
processor 12th Gen Intel(R) Core(TM) i7-12700 (CPU 2, one core)
clock max 2.10 GHz, governor performance, turbo off, SMT off
memory 31788 MiB
OS / kernel Debian GNU/Linux 13 (trixie) / 6.12.107+deb13-amd64
compiler / build tool gcc (Debian 14.2.0-19) 14.2.0 / cmake version 3.31.6
campaign start / end (UTC) 2026-09-25T10:02:21 / 2026-09-28T10:51:21

3. Functional testing (KAT)

Each library was checked against the submitted KAT vectors (SHA-256 manifest kex-05/kat.sha256 in the harness) before timing.

instance build flags KAT
LoomKEX-128 guide PASS
LoomKEX-256 guide PASS
LoomKEX-512 guide PASS

4. Performance

instance operation mean cycles mean time ops/s median trial n (trials × iters)
LoomKEX-128 exchange 30.90 M 14.8 ms 67.8 14.8 ms 230 (5 × 46)
LoomKEX-128 init_a 8.60 M 4.11 ms 243 4.11 ms 230 (5 × 46)
LoomKEX-128 init_b 9.51 M 4.54 ms 220 4.54 ms 230 (5 × 46)
LoomKEX-128 pass1 549.6 k 262 µs 3.81e+03 262 µs 230 (5 × 46)
LoomKEX-128 pass2 621.9 k 297 µs 3.37e+03 297 µs 230 (5 × 46)
LoomKEX-128 pass3 4.63 M 2.21 ms 452 2.21 ms 230 (5 × 46)
LoomKEX-128 pass4 5.79 M 2.76 ms 362 2.76 ms 230 (5 × 46)
LoomKEX-128 derive_a 1.21 M 576 µs 1.74e+03 576 µs 230 (5 × 46)
LoomKEX-128 derive_b 4246 1.86 µs 5.39e+05 1.84 µs 230 (5 × 46)
LoomKEX-256 exchange 38.83 M 18.5 ms 53.9 18.5 ms 175 (5 × 35)
LoomKEX-256 init_a 8.81 M 4.21 ms 238 4.21 ms 175 (5 × 35)
LoomKEX-256 init_b 10.35 M 4.94 ms 202 4.94 ms 175 (5 × 35)
LoomKEX-256 pass1 764.7 k 365 µs 2.74e+03 365 µs 175 (5 × 35)
LoomKEX-256 pass2 881.8 k 421 µs 2.38e+03 421 µs 175 (5 × 35)
LoomKEX-256 pass3 7.42 M 3.55 ms 282 3.54 ms 175 (5 × 35)
LoomKEX-256 pass4 8.93 M 4.26 ms 234 4.26 ms 175 (5 × 35)
LoomKEX-256 derive_a 1.67 M 795 µs 1.26e+03 795 µs 175 (5 × 35)
LoomKEX-256 derive_b 6333 2.85 µs 3.51e+05 2.85 µs 175 (5 × 35)
LoomKEX-512 exchange 81.64 M 39 ms 25.6 39 ms 125 (5 × 25)
LoomKEX-512 init_a 19.24 M 9.19 ms 109 9.19 ms 125 (5 × 25)
LoomKEX-512 init_b 20.27 M 9.69 ms 103 9.69 ms 125 (5 × 25)
LoomKEX-512 pass1 2.53 M 1.22 ms 819 1.22 ms 125 (5 × 25)
LoomKEX-512 pass2 3.09 M 1.48 ms 677 1.48 ms 125 (5 × 25)
LoomKEX-512 pass3 15.28 M 7.31 ms 137 7.31 ms 125 (5 × 25)
LoomKEX-512 pass4 18.04 M 8.64 ms 116 8.63 ms 125 (5 × 25)
LoomKEX-512 derive_a 3.15 M 1.5 ms 665 1.5 ms 125 (5 × 25)
LoomKEX-512 derive_b 11.6 k 5.43 µs 1.84e+05 5.43 µs 125 (5 × 25)

5. Resource consumption

Static memory is approximated by the library's loadable ELF segments; peak memory is the process high-water mark (VmHWM) including the benchmark driver and libc, so both are upper-bound proxies rather than isolated algorithm memory.

instance operation static: ELF image (bytes) baseline RSS peak RSS
LoomKEX-128 exchange 108105 1944 KiB 2044 KiB
LoomKEX-128 init_a 108105 1936 KiB 2052 KiB
LoomKEX-128 init_b 108105 1948 KiB 2056 KiB
LoomKEX-128 pass1 108105 1968 KiB 2060 KiB
LoomKEX-128 pass2 108105 1964 KiB 2036 KiB
LoomKEX-128 pass3 108105 1964 KiB 2036 KiB
LoomKEX-128 pass4 108105 1960 KiB 2032 KiB
LoomKEX-128 derive_a 108105 1948 KiB 2020 KiB
LoomKEX-128 derive_b 108105 1940 KiB 2052 KiB
LoomKEX-256 exchange 113917 2080 KiB 2152 KiB
LoomKEX-256 init_a 113917 2072 KiB 2172 KiB
LoomKEX-256 init_b 113917 2076 KiB 2172 KiB
LoomKEX-256 pass1 113917 2084 KiB 2156 KiB
LoomKEX-256 pass2 113917 2048 KiB 2184 KiB
LoomKEX-256 pass3 113917 2088 KiB 2196 KiB
LoomKEX-256 pass4 113917 2068 KiB 2200 KiB
LoomKEX-256 derive_a 113917 2100 KiB 2172 KiB
LoomKEX-256 derive_b 113917 2060 KiB 2192 KiB
LoomKEX-512 exchange 119277 2428 KiB 2504 KiB
LoomKEX-512 init_a 119277 2400 KiB 2528 KiB
LoomKEX-512 init_b 119277 2416 KiB 2492 KiB
LoomKEX-512 pass1 119277 2404 KiB 2520 KiB
LoomKEX-512 pass2 119277 2428 KiB 2504 KiB
LoomKEX-512 pass3 119277 2424 KiB 2516 KiB
LoomKEX-512 pass4 119277 2404 KiB 2480 KiB
LoomKEX-512 derive_a 119277 2416 KiB 2532 KiB
LoomKEX-512 derive_b 119277 2404 KiB 2528 KiB

6. Transmission and storage overhead

Bandwidth counts all specified protocol messages and each required public key once. Public keys are transmitted bytes too. Certificates and transport framing are excluded. The published raw timing records are unchanged.

instance passes messages (bytes; raw API) protocol-message bytes public key A / B bandwidth (bytes) long-term sk (API cap) shared secret
LoomKEX-128 4 792 / 776 / 1235 / 1235 4038 1264 / 1264 6566 2288 16
LoomKEX-256 4 1352 / 1384 / 2485 / 2485 7706 1952 / 1952 11610 3680 32
LoomKEX-512 4 2952 / 3016 / 5101 / 5101 16170 3648 / 3648 23466 7104 64

Symmetric primitives

Survey verdict: ICCS-only — grep hits for AES/Keccak/OpenSSL are not reachable in the built library

Share of each operation spent in the ICCS placeholder hash functions and in the ICCS DRNG (reference build, measured in the same run with link-time wrappers):

instance operation pseudohash/XOF/sm3 DRNG calls per operation
LoomKEX-128 exchange 3.1% 71% drng 833, pseudoXOF 84
LoomKEX-256 exchange 3.4% 69% drng 939, pseudoXOF 63
LoomKEX-512 exchange 6.2% 67% drng 1.75e+03, pseudoXOF 67

7. Raw evidence index

Paths are relative to performance/data/x86_1/ in the harness; each JSON file records its commands, environment and trials.

instance item file
LoomKEX-128 KAT log (sha256 5ee8305db770e4cb…) kat/kex-05/LoomKEX-128.log
LoomKEX-128 timing derive_a records/kex-05/LoomKEX-128__derive_a.json
LoomKEX-128 timing derive_b records/kex-05/LoomKEX-128__derive_b.json
LoomKEX-128 timing exchange records/kex-05/LoomKEX-128__exchange.json
LoomKEX-128 timing init_a records/kex-05/LoomKEX-128__init_a.json
LoomKEX-128 timing init_b records/kex-05/LoomKEX-128__init_b.json
LoomKEX-128 timing pass1 records/kex-05/LoomKEX-128__pass1.json
LoomKEX-128 timing pass2 records/kex-05/LoomKEX-128__pass2.json
LoomKEX-128 timing pass3 records/kex-05/LoomKEX-128__pass3.json
LoomKEX-128 timing pass4 records/kex-05/LoomKEX-128__pass4.json
LoomKEX-128 hash profile exchange profile/kex-05/LoomKEX-128__exchange.json
LoomKEX-256 KAT log (sha256 1246b71c4a1f2b2d…) kat/kex-05/LoomKEX-256.log
LoomKEX-256 timing derive_a records/kex-05/LoomKEX-256__derive_a.json
LoomKEX-256 timing derive_b records/kex-05/LoomKEX-256__derive_b.json
LoomKEX-256 timing exchange records/kex-05/LoomKEX-256__exchange.json
LoomKEX-256 timing init_a records/kex-05/LoomKEX-256__init_a.json
LoomKEX-256 timing init_b records/kex-05/LoomKEX-256__init_b.json
LoomKEX-256 timing pass1 records/kex-05/LoomKEX-256__pass1.json
LoomKEX-256 timing pass2 records/kex-05/LoomKEX-256__pass2.json
LoomKEX-256 timing pass3 records/kex-05/LoomKEX-256__pass3.json
LoomKEX-256 timing pass4 records/kex-05/LoomKEX-256__pass4.json
LoomKEX-256 hash profile exchange profile/kex-05/LoomKEX-256__exchange.json
LoomKEX-512 KAT log (sha256 43b12c64434096a8…) kat/kex-05/LoomKEX-512.log
LoomKEX-512 timing derive_a records/kex-05/LoomKEX-512__derive_a.json
LoomKEX-512 timing derive_b records/kex-05/LoomKEX-512__derive_b.json
LoomKEX-512 timing exchange records/kex-05/LoomKEX-512__exchange.json
LoomKEX-512 timing init_a records/kex-05/LoomKEX-512__init_a.json
LoomKEX-512 timing init_b records/kex-05/LoomKEX-512__init_b.json
LoomKEX-512 timing pass1 records/kex-05/LoomKEX-512__pass1.json
LoomKEX-512 timing pass2 records/kex-05/LoomKEX-512__pass2.json
LoomKEX-512 timing pass3 records/kex-05/LoomKEX-512__pass3.json
LoomKEX-512 timing pass4 records/kex-05/LoomKEX-512__pass4.json
LoomKEX-512 hash profile exchange profile/kex-05/LoomKEX-512__exchange.json

Scripts: performance/campaign.py, performance/ngcc_perf.c, performance/hashprof/ in the harness.