mirror of
https://github.com/shadowsocks/shadowsocks-libev.git
synced 2026-10-03 16:13:59 +00:00
Max Lv
201e70c4bd
Bundle pinned offline dependencies, remove libcork/libipset and submodule requirements, and add portable runtime helpers with relocatable static/shared library installations.
Add Clang static build validation for Linux/musl, macOS and Windows, real TCP/UDP and SIP003 interoperability coverage, and recorded performance tradeoffs. All 21 hosted checks pass at the reviewed PR head 8d504e6218.
77 lines
3.6 KiB
Markdown
77 lines
3.6 KiB
Markdown
# Modernization measurements
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Local macOS arm64 results, 2026-09-10. Base commit: `8fe386b`; comparison:
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`feature/self-contained-portable-c`. Raw JSON lives in [measurements](measurements/).
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These are short loopback measurements on one machine, not capacity guarantees.
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## Size and runtime dependencies
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Unstripped Release executable sizes in bytes:
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| Program | Old system-shared | Old static dependencies | Bundled | Minimal |
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|---|---:|---:|---:|---:|
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| ss-local | 295,912 | 1,326,328 | 756,920 | 416,424 |
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| ss-server | 314,360 | 1,500,968 | 962,632 | 622,024 |
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| ss-tunnel | 268,680 | 828,712 | 416,440 | 397,704 |
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Bundled programs link only macOS OS libraries (`libSystem`, and where needed
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`libresolv`). They need no separately installed libev, c-ares, PCRE2, libsodium
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or Mbed TLS. Compared with the old static-dependency build, ss-server shrinks
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about 36%; minimal shrinks about 59%. Compared with a shared-dependency binary
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alone, bundling makes the executable larger; that comparison excludes the old
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libraries' disk footprint. Bundled source archives add roughly 12 MB to checkout
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and release size. There is no configure-time network access or submodule fetch.
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## TCP and resident memory
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Median of three 100 MiB transfers using `tests/stress_test.py`, old shared
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dependencies versus bundled. Both sets pass all nine transfers.
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| Cipher | Before Mbps | Bundled Mbps | Before server RSS after, KiB | Bundled server RSS after, KiB |
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|---|---:|---:|---:|---:|
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| AES-128-GCM | 7,002 | 7,003 | 3,488 | 3,040 |
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| AES-256-GCM | 7,776 | 8,498 | 3,488 | 2,992 |
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| ChaCha20-IETF-Poly1305 | 3,439 | 3,268 | 3,472 | 3,072 |
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Bundled tunnel RSS after transfer was about 2,000–2,032 KiB versus
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2,576–2,592 KiB before. RSS includes OS accounting and shared-page effects;
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this is not a proof of bounded memory under arbitrary workloads. Transfer times
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are short (roughly 0.1–0.3 s), so the apparent AES-256 improvement and ChaCha
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regression need longer controlled measurements before drawing performance claims.
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## UDP
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Median of three runs, 2,000 sequential 1,200-byte echo packets per run through
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SOCKS5 UDP ASSOCIATE. Every packet's payload and relay source port are checked.
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| Cipher | Before payload Mbps | Bundled payload Mbps |
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|---|---:|---:|
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| AES-128-GCM | 77.43 | 75.01 |
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| AES-256-GCM | 81.34 | 63.33 |
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| ChaCha20-IETF-Poly1305 | 78.65 | 67.89 |
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This round-trip benchmark includes Python thread creation, scheduling and SOCKS
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overhead. It shows lower observed UDP rates in this run, up to 22%; modernization
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is not claimed to improve UDP throughput. The portable libsodium backend is a
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maintenance/performance tradeoff. Optimized backends require separate compiler
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probes and cross-platform known-answer tests before adoption.
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Independently of these timings, the new interoperability test exposed the old
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MTU-sized receive buffer truncating 4 KiB UDP payloads. Full datagram reception
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now passes 1, 128, 1,200 and 4,096-byte interoperability cases against
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shadowsocks-rust in both directions.
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## Reproduce
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```sh
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python3 tests/stress_test.py --bin build-bundled/bin --size 100 --repeat 3 --json tcp.json
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python3 tests/measure_udp.py --bin build-bundled/bin --output udp.json
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python3 tests/interop.py --bin build-bundled/bin
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python3 tests/interop.py --self --bin build-bundled/bin --plugin tests/sip003_fixture.py
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```
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Run comparisons serially. The baseline was rebuilt from its own worktree using
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the preserved original dependency checkouts; no modernization fixes were applied
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to that source. The historical curl interop harness obeyed `no_proxy` and could
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bypass SOCKS, so its old results are excluded from compatibility evidence.
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