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

kex-05 Loom — performance on AArch64 (system arm_1)

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

1. Basic information

2. Assessment environment

item value
processor Qualcomm Oryon (CPU 2, one core)
machine ASUS Vivobook S 15
clock fixed 2.71 GHz (governor performance, minimum = maximum), boost off, SMT none
memory 30562 MiB
OS / kernel Ubuntu 26.04.1 LTS / 7.0.0-34-generic
compiler / build tool gcc (Ubuntu 15.2.0-16ubuntu1) 15.2.0 / cmake version 4.2.3
campaign start / end (UTC) 2026-09-28T15:05:46 / 2026-09-29T08:43:52

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 29.95 M 11.1 ms 90 11.1 ms 195 (5 × 39)
LoomKEX-128 init_a 8.15 M 3.03 ms 331 3.02 ms 195 (5 × 39)
LoomKEX-128 init_b 9.66 M 3.59 ms 279 3.58 ms 195 (5 × 39)
LoomKEX-128 pass1 503.8 k 187 µs 5.35e+03 185 µs 195 (5 × 39)
LoomKEX-128 pass2 566.8 k 210 µs 4.76e+03 207 µs 195 (5 × 39)
LoomKEX-128 pass3 4.40 M 1.63 ms 612 1.63 ms 195 (5 × 39)
LoomKEX-128 pass4 5.50 M 2.04 ms 490 2.04 ms 195 (5 × 39)
LoomKEX-128 derive_a 1.13 M 420 µs 2.38e+03 420 µs 195 (5 × 39)
LoomKEX-128 derive_b 6479 2.34 µs 4.27e+05 2.34 µs 195 (5 × 39)
LoomKEX-256 exchange 37.19 M 13.8 ms 72.5 13.8 ms 150 (5 × 30)
LoomKEX-256 init_a 8.85 M 3.28 ms 304 3.28 ms 150 (5 × 30)
LoomKEX-256 init_b 9.57 M 3.55 ms 282 3.55 ms 150 (5 × 30)
LoomKEX-256 pass1 698.1 k 259 µs 3.86e+03 257 µs 150 (5 × 30)
LoomKEX-256 pass2 777.4 k 288 µs 3.47e+03 288 µs 150 (5 × 30)
LoomKEX-256 pass3 7.12 M 2.64 ms 379 2.64 ms 150 (5 × 30)
LoomKEX-256 pass4 8.59 M 3.19 ms 314 3.17 ms 150 (5 × 30)
LoomKEX-256 derive_a 1.57 M 582 µs 1.72e+03 581 µs 150 (5 × 30)
LoomKEX-256 derive_b 10.6 k 3.94 µs 2.54e+05 3.88 µs 150 (5 × 30)
LoomKEX-512 exchange 79.08 M 29.3 ms 34.1 29.3 ms 110 (5 × 22)
LoomKEX-512 init_a 18.31 M 6.79 ms 147 6.79 ms 110 (5 × 22)
LoomKEX-512 init_b 20.50 M 7.6 ms 131 7.61 ms 110 (5 × 22)
LoomKEX-512 pass1 2.38 M 881 µs 1.13e+03 881 µs 110 (5 × 22)
LoomKEX-512 pass2 2.88 M 1.07 ms 937 1.07 ms 110 (5 × 22)
LoomKEX-512 pass3 14.77 M 5.48 ms 182 5.48 ms 110 (5 × 22)
LoomKEX-512 pass4 17.32 M 6.43 ms 156 6.43 ms 110 (5 × 22)
LoomKEX-512 derive_a 2.89 M 1.07 ms 931 1.07 ms 110 (5 × 22)
LoomKEX-512 derive_b 21.6 k 7.94 µs 1.26e+05 7.95 µs 110 (5 × 22)

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 103320 1672 KiB 1740 KiB
LoomKEX-128 init_a 103320 1672 KiB 1740 KiB
LoomKEX-128 init_b 103320 1672 KiB 1740 KiB
LoomKEX-128 pass1 103320 3668 KiB 3732 KiB
LoomKEX-128 pass2 103320 1672 KiB 1740 KiB
LoomKEX-128 pass3 103320 1672 KiB 1740 KiB
LoomKEX-128 pass4 103320 1672 KiB 1740 KiB
LoomKEX-128 derive_a 103320 1672 KiB 1740 KiB
LoomKEX-128 derive_b 103320 3652 KiB 3716 KiB
LoomKEX-256 exchange 107924 1816 KiB 1884 KiB
LoomKEX-256 init_a 107924 3716 KiB 3780 KiB
LoomKEX-256 init_b 107924 3832 KiB 3896 KiB
LoomKEX-256 pass1 107924 1816 KiB 1884 KiB
LoomKEX-256 pass2 107924 1816 KiB 1884 KiB
LoomKEX-256 pass3 107924 3836 KiB 3900 KiB
LoomKEX-256 pass4 107924 1816 KiB 1884 KiB
LoomKEX-256 derive_a 107924 3728 KiB 3792 KiB
LoomKEX-256 derive_b 107924 1816 KiB 1884 KiB
LoomKEX-512 exchange 112288 2148 KiB 2224 KiB
LoomKEX-512 init_a 112288 4036 KiB 4100 KiB
LoomKEX-512 init_b 112288 2148 KiB 2224 KiB
LoomKEX-512 pass1 112288 4152 KiB 4216 KiB
LoomKEX-512 pass2 112288 3968 KiB 4032 KiB
LoomKEX-512 pass3 112288 4024 KiB 4088 KiB
LoomKEX-512 pass4 112288 3920 KiB 3984 KiB
LoomKEX-512 derive_a 112288 3968 KiB 4032 KiB
LoomKEX-512 derive_b 112288 4132 KiB 4196 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 3.2% 70% drng 808, pseudoXOF 84
LoomKEX-256 exchange 3.6% 68% drng 912, pseudoXOF 63
LoomKEX-512 exchange 6.1% 66% drng 1.77e+03, pseudoXOF 67

7. Raw evidence index

Paths are relative to performance/data/arm_1/ in the harness; each JSON file records its commands, environment and trials.

instance item file
LoomKEX-128 KAT log (sha256 ca6cdab8b040f619…) 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 1fd101fa673ee4df…) 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 4222b89ae0c2d697…) 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.