diff --git a/changelog.md b/changelog.md
index 0349328..9480dad 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,7 @@
+## V2.2.10
+- **[v2]** refine cache logic
+- **[v2]** replace fs sync methods to promises
+
 ## V2.2.8
 - **[v2]** refine some logs
 - **[v2]** make hash of outputs stable
diff --git a/lib/cache.js b/lib/cache.js
index d5986a8..d3726d6 100644
--- a/lib/cache.js
+++ b/lib/cache.js
@@ -1,50 +1,54 @@
 const { readFile } = require('fs/promises');
 class BuildCache {
   /**
-   * @param {(...args: any[]) => void} log
+   * @param {import('..').Build} build
    */
-  constructor(log) {
-    this.log = log || ((...args) => console.log(...args));
+  constructor(build) {
+    this.build = build;
+    /**
+     * @type {import('..').Build['context']['log']}
+     */
+    this.log = build.context.log;
     /**
      * @type {Map<string, {result: import('esbuild').OnLoadResult; input: string}}
      */
     this.cache = new Map();
   }
   /**
-   * @description key should be absolute path
-   * @param {string} key
+   * @param {string} absPath
    * @returns {Promise<import('esbuild').OnLoadResult|void>}
    */
-  async get(key) {
-    const cachedData = this.cache.get(key);
+  async get(absPath) {
+    const cachedData = this.cache.get(absPath);
     if (cachedData) {
-      this.log(`find cache data, check if input changed(${key})...`);
-      const input = await readFile(key, { encoding: 'utf8' });
+      this.log(
+        `find cache data, check if content changed(${this.build.context.relative(absPath)})...`
+      );
+      const input = await readFile(absPath, { encoding: 'utf8' });
       if (input === cachedData.input) {
-        this.log(`input not changed, return cache(${key})`);
+        this.log(`content not changed, return cache(${this.build.context.relative(absPath)})`);
         return cachedData.result;
       }
-      this.log(`input changed(${key})`);
+      this.log(`content changed(${this.build.context.relative(absPath)}), rebuilding...`);
       return void 0;
     }
-    this.log(`cache data not found(${key})`);
+    this.log(`cache data not found(${this.build.context.relative(absPath)}), building...`);
     return void 0;
   }
   /**
-   * @description key should be absolute path
-   * @param {string} key
+   * @param {string} absPath
    * @param {import('esbuild').OnLoadResult} result
    * @param {string} originContent
    * @returns {Promise<void>}
    */
-  async set(key, result, originContent) {
+  async set(absPath, result, originContent) {
     const m = process.memoryUsage.rss();
     if (m / 1024 / 1024 > 250) {
       this.log('memory usage > 250M');
       this.clear();
     }
-    const input = originContent || (await readFile(key, { encoding: 'utf8' }));
-    this.cache.set(key, { input, result });
+    const input = originContent || (await readFile(absPath, { encoding: 'utf8' }));
+    this.cache.set(absPath, { input, result });
   }
   clear() {
     this.log('clear cache');
diff --git a/lib/plugin.js b/lib/plugin.js
index bd073e6..e62c716 100644
--- a/lib/plugin.js
+++ b/lib/plugin.js
@@ -1,6 +1,5 @@
 const path = require('path');
 const { createHash } = require('crypto');
-const { readFileSync } = require('fs');
 const { readFile, appendFile } = require('fs/promises');
 const {
   getLogger,
@@ -105,24 +104,23 @@ export default new Proxy(${classNamesMapString}, {
  * @return {Promise<void>}
  */
 const prepareBuild = async (build, options) => {
-  const buildId = getBuildId(build);
+  const buildId = await getBuildId(build);
   build.initialOptions.metafile = true;
   const packageRoot = options.root;
   const buildRoot = getRootDir(build);
   const log = getLogger(build);
-  const cache = new BuildCache(log);
   const relative = (to) => getRelativePath(build, to);
 
-  log(`root of this build(#${buildId}):`, buildRoot);
-
   build.context = {
     buildId,
     buildRoot,
     packageRoot,
     log,
-    relative,
-    cache
+    relative
   };
+  build.context.cache = new BuildCache(build);
+
+  log(`root of this build(#${buildId}):`, buildRoot);
 };
 
 /**
@@ -181,7 +179,7 @@ const onLoadModulesCss = async (build, options, args) => {
 
   log(`loading ${rpath}${args.suffix}`);
 
-  log(`checking cache for`, absPath);
+  log(`checking cache for`, rpath);
   const cached = await cache.get(absPath);
   if (cached) {
     log('return build cache for', rpath);
@@ -211,7 +209,7 @@ const onLoadModulesCss = async (build, options, args) => {
     loader: 'js'
   };
   await cache.set(absPath, result, originCss);
-  log(`add build result to cache for ${absPath}`);
+  log(`add build result to cache for ${rpath}`);
 
   return result;
 };
@@ -279,10 +277,10 @@ const onLoadBuiltModulesCss = async ({ pluginData }, build) => {
 const onEnd = async (build, options, result) => {
   const { buildId, buildRoot, cache } = build.context;
   const log = getLogger(build);
-  log('done');
 
   if (options.inject === true || typeof options.inject === 'string') {
     const cssContents = [];
+
     const { entryPoints } = build.initialOptions;
     let entriesArray = [];
     if (Array.isArray(entryPoints)) {
@@ -295,24 +293,32 @@ const onEnd = async (build, options, result) => {
         });
     }
     const entries = entriesArray.map((p) => (path.isAbsolute(p) ? p : path.resolve(buildRoot, p)));
+
     log('entries:', entries);
+
     let injectTo = null;
-    Object.keys(result.metafile?.outputs ?? []).forEach((f) => {
-      if (
-        !injectTo &&
-        result.metafile.outputs[f].entryPoint &&
-        entries.includes(path.resolve(buildRoot, result.metafile.outputs[f].entryPoint)) &&
-        path.extname(f) === '.js'
-      ) {
-        injectTo = path.resolve(buildRoot, f);
-      }
-      if (path.extname(f) === '.css') {
-        const fullpath = path.resolve(buildRoot, f);
-        const css = readFileSync(fullpath);
-        cssContents.push(`${css}\n`);
-      }
-    });
+    const outputs = Object.keys(result.metafile?.outputs ?? []);
+
+    await Promise.all(
+      outputs.map(async (f) => {
+        if (
+          !injectTo &&
+          result.metafile.outputs[f].entryPoint &&
+          entries.includes(path.resolve(buildRoot, result.metafile.outputs[f].entryPoint)) &&
+          path.extname(f) === '.js'
+        ) {
+          injectTo = path.resolve(buildRoot, f);
+        }
+        if (path.extname(f) === '.css') {
+          const fullpath = path.resolve(buildRoot, f);
+          const css = await readFile(fullpath, { encoding: 'utf8' });
+          cssContents.push(`${css}`);
+        }
+      })
+    );
+
     log('inject css to', path.relative(buildRoot, injectTo));
+
     if (injectTo && cssContents.length) {
       const allCss = cssContents.join('');
       const container = typeof options.inject === 'string' ? options.inject : 'head';
@@ -321,6 +327,8 @@ const onEnd = async (build, options, result) => {
       await appendFile(injectTo, injectedCode, { encoding: 'utf-8' });
     }
   }
+
+  log('finished');
 };
 
 /**
diff --git a/lib/utils.js b/lib/utils.js
index 97ea320..2649858 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -1,6 +1,6 @@
 const path = require('path');
 const { createHash } = require('crypto');
-const { readFileSync } = require('fs');
+const { readFile } = require('fs/promises');
 const pluginName = require('../package.json').name.toLowerCase();
 const pluginNamespace = `${pluginName}-namespace`;
 const buildingCssSuffix = `?${pluginName}-building`;
@@ -103,9 +103,9 @@ const getRelativePath = (build, to) => {
  * getBuildId
  * @description buildId should be stable so that the hash of output files are stable
  * @param {import('..').Build} build
- * @returns {string}
+ * @returns {Promise<string>}
  */
-const getBuildId = (build) => {
+const getBuildId = async (build) => {
   const { entryPoints } = build.initialOptions;
   const buildRoot = getRootDir(build);
   let entries = [];
@@ -118,12 +118,14 @@ const getBuildId = (build) => {
         entries.push(entryPoints[k]);
       });
   }
-  const entryContents = entries
-    .map((p) => {
-      const absPath = path.isAbsolute(p) ? p : path.resolve(buildRoot, p);
-      return readFileSync(absPath, { encoding: 'utf8' }).trim();
-    })
-    .join('');
+  const entryContents = (
+    await Promise.all(
+      entries.map(async (p) => {
+        const absPath = path.isAbsolute(p) ? p : path.resolve(buildRoot, p);
+        return (await readFile(absPath, { encoding: 'utf8' })).trim();
+      })
+    )
+  ).join('');
   return createHash('sha256').update(entryContents).digest('hex');
 };