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Neil
28cb372559
`window.api.platform.get()` runs ~19x/sec while the app is idle. Every call recomputed a payload whose fields are all fixed for the process lifetime (`process.platform`, `process.getSystemVersion()`, `process.arch`, the shell env vars, and the env-derived Linux display server), allocated a fresh object, and crossed the context bridge. Memoize the payload lazily at preload module scope and freeze it, and cache the resolved platform in `getRendererAppPlatform()` so the 32 renderer call sites stop crossing the bridge on every render. The user-agent fallback stays uncached because the web client installs its platform API after boot.
29 lines
1.2 KiB
TypeScript
29 lines
1.2 KiB
TypeScript
import { getLinuxDisplayServer } from '../preload-runtime-support'
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import type { PreloadApi } from '../api-types'
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type PlatformInfo = ReturnType<PreloadApi['platform']['get']>
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// Why: the renderer reads this on its render cadence, and every field below is fixed
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// for the process lifetime, so resolve once and hand back the same frozen payload.
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let platformInfo: PlatformInfo | undefined
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function resolvePlatformInfo(): PlatformInfo {
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return Object.freeze({
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platform: process.platform,
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// Why: sandboxed preload cannot require node:os; Electron exposes the OS
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// version on process.getSystemVersion when available.
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osRelease:
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(process as NodeJS.Process & { getSystemVersion?: () => string }).getSystemVersion?.() ?? '',
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arch: process.arch,
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// Why: these identify the default shell without probing user config files.
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// process.env is available in the sandboxed preload; node:os is not.
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shell: process.env.SHELL?.trim() || process.env.ComSpec?.trim() || '',
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displayServer: getLinuxDisplayServer()
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})
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}
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export const platformApi = {
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// Why: resolved lazily so preload startup keeps paying nothing for it.
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get: () => (platformInfo ??= resolvePlatformInfo())
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} satisfies PreloadApi['platform']
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