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perf(backend): 必要になるまでnsfwjsを読み込まないように

This commit is contained in:
syuilo 2025-11-26 20:40:20 +09:00
parent 18caa20969
commit 1590a73d3d
1 changed files with 4 additions and 3 deletions
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7
packages/backend/src/core/AiService.ts
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@ -7,11 +7,11 @@ import * as fs from 'node:fs';
import { fileURLToPath } from 'node:url';
import { dirname } from 'node:path';
import { Injectable } from '@nestjs/common';
import * as nsfw from 'nsfwjs';
import si from 'systeminformation';
import { Mutex } from 'async-mutex';
import fetch from 'node-fetch';
import { bindThis } from '@/decorators.js';
import type { NSFWJS, PredictionType } from 'nsfwjs';
const _filename = fileURLToPath(import.meta.url);
const _dirname = dirname(_filename);
@ -21,7 +21,7 @@ let isSupportedCpu: undefined | boolean = undefined;
@Injectable()
export class AiService {
private model: nsfw.NSFWJS;
private model: NSFWJS;
private modelLoadMutex: Mutex = new Mutex();
constructor(
@ -29,7 +29,7 @@ export class AiService {
}
@bindThis
public async detectSensitive(source: string | Buffer): Promise<nsfw.PredictionType[] | null> {
public async detectSensitive(source: string | Buffer): Promise<PredictionType[] | null> {
try {
if (isSupportedCpu === undefined) {
isSupportedCpu = await this.computeIsSupportedCpu();
@ -44,6 +44,7 @@ export class AiService {
tf.env().global.fetch = fetch;
if (this.model == null) {
const nsfw = await import('nsfwjs');
await this.modelLoadMutex.runExclusive(async () => {
if (this.model == null) {
this.model = await nsfw.load(`file://${_dirname}/../../nsfw-model/`, { size: 299 });