SashegDev
874b6f20c2
Основа — Horizon (MIT). История апстрима не переносится: этот репозиторий ведёт свою.
47 lines
2.5 KiB
Markdown
47 lines
2.5 KiB
Markdown
# Shared startup release response
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Startup previously fetched `/releases?per_page=100` on two worker threads: one
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for game releases and one for updates. It now decodes that response once and
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parses game releases once, publishing them before older-launcher fallback
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lookups. Manual and four-hour update checks still request fresh data. Release
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page retries remain independent. Existing self-update guards still apply.
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Run the committed benchmark against the actual backend implementation:
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```sh
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CARGO_INCREMENTAL=0 CARGO_PROFILE_DEV_DEBUG=0 CARGO_PROFILE_TEST_DEBUG=0 \
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cargo test --manifest-path launcher/Cargo.toml --locked --lib \
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backend::release_loading_tests::benchmark_shared_startup_response \
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-- --ignored --nocapture
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```
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Measured on 2026-10-14, Linux x86_64, AMD Ryzen 5 5600X, Rust 1.99.0,
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unoptimized Cargo test profile with debug information disabled. A shared
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`CARGO_TARGET_DIR` was used for local build reuse. Each case warms up 20 times
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and takes the median of 201 samples; outputs are validated for equivalence
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and passed to `black_box`.
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| Scenario | Before median | After median | Ratio | Fetches per startup |
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| --- | ---: | ---: | ---: | ---: |
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| Serial parsing/decoding work, zero transport delay | 14.701 ms | 7.339 ms | 2.003x | 2 → 1 |
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| Concurrent startup workers, 5 ms per mock request | 14.778 ms | 13.642 ms | 1.083x | 2 → 1 |
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The measured 201 samples make 402 mock release-list fetches before and 201
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after. The concurrent case reduces elapsed time by 7.7%; the two old requests
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can overlap, so halving requests does not halve startup latency.
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The synthetic 453,197-byte JSON contains 99 game releases (including a draft)
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with roughly 4 KiB of notes each and one launcher release with a platform asset.
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The mock fetch decodes identical bytes for each request; it does not exercise
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HTTP, TLS, GitHub rate limits, filesystem installation scans, GUI rendering or
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self-update downloads. The comparison covers backend orchestration, JSON
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decoding, sorting, filtering and update selection, not end-to-end launcher
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startup or release-build timing. Fallback timing is omitted from the benchmark
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and its ordering/error behavior is tested separately. No persistent cache or
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extra copy of the game-release vector is introduced.
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Validation: 26 launcher library tests passed (benchmark ignored by default);
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the benchmark passed explicitly; full launcher all-target check and Clippy
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with `-D warnings` passed; root and launcher format checks and `git diff --check`
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passed. The GUI compiled but was not launched interactively.
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