diff --git a/package-lock.json b/package-lock.json
index d229c30..ecfb64e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,7 +11,8 @@
             "dependencies": {
                 "diff-match-patch": "^1.0.5",
                 "idb": "^7.1.1",
-                "xxhash-wasm": "^0.4.2"
+                "xxhash-wasm": "^0.4.2",
+                "xxhash-wasm-102": "npm:xxhash-wasm@^1.0.2"
             },
             "devDependencies": {
                 "@tsconfig/svelte": "^4.0.1",
@@ -4076,6 +4077,12 @@
             "resolved": "https://registry.npmjs.org/xxhash-wasm/-/xxhash-wasm-0.4.2.tgz",
             "integrity": "sha512-/eyHVRJQCirEkSZ1agRSCwriMhwlyUcFkXD5TPVSLP+IPzjsqMVzZwdoczLp1SoQU0R3dxz1RpIK+4YNQbCVOA=="
         },
+        "node_modules/xxhash-wasm-102": {
+            "name": "xxhash-wasm",
+            "version": "1.0.2",
+            "resolved": "https://registry.npmjs.org/xxhash-wasm/-/xxhash-wasm-1.0.2.tgz",
+            "integrity": "sha512-ibF0Or+FivM9lNrg+HGJfVX8WJqgo+kCLDc4vx6xMeTce7Aj+DLttKbxxRR/gNLSAelRc1omAPlJ77N/Jem07A=="
+        },
         "node_modules/yallist": {
             "version": "4.0.0",
             "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
@@ -7032,6 +7039,11 @@
             "resolved": "https://registry.npmjs.org/xxhash-wasm/-/xxhash-wasm-0.4.2.tgz",
             "integrity": "sha512-/eyHVRJQCirEkSZ1agRSCwriMhwlyUcFkXD5TPVSLP+IPzjsqMVzZwdoczLp1SoQU0R3dxz1RpIK+4YNQbCVOA=="
         },
+        "xxhash-wasm-102": {
+            "version": "npm:xxhash-wasm@1.0.2",
+            "resolved": "https://registry.npmjs.org/xxhash-wasm/-/xxhash-wasm-1.0.2.tgz",
+            "integrity": "sha512-ibF0Or+FivM9lNrg+HGJfVX8WJqgo+kCLDc4vx6xMeTce7Aj+DLttKbxxRR/gNLSAelRc1omAPlJ77N/Jem07A=="
+        },
         "yallist": {
             "version": "4.0.0",
             "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
diff --git a/package.json b/package.json
index 77636f4..4533de4 100644
--- a/package.json
+++ b/package.json
@@ -47,6 +47,7 @@
     "dependencies": {
         "diff-match-patch": "^1.0.5",
         "idb": "^7.1.1",
-        "xxhash-wasm": "^0.4.2"
+        "xxhash-wasm": "^0.4.2",
+        "xxhash-wasm-102": "npm:xxhash-wasm@^1.0.2"
     }
 }
diff --git a/src/CmdConfigSync.ts b/src/CmdConfigSync.ts
index 1926873..404d8f8 100644
--- a/src/CmdConfigSync.ts
+++ b/src/CmdConfigSync.ts
@@ -7,7 +7,7 @@ import { ICXHeader, PERIODIC_PLUGIN_SWEEP, } from "./types";
 import { Parallels, delay, getDocData } from "./lib/src/utils";
 import { Logger } from "./lib/src/logger";
 import { WrappedNotice } from "./lib/src/wrapper";
-import { base64ToArrayBuffer, arrayBufferToBase64, readString, uint8ArrayToHexString } from "./lib/src/strbin";
+import { base64ToArrayBuffer, arrayBufferToBase64, readString, crc32CKHash } from "./lib/src/strbin";
 import { runWithLock } from "./lib/src/lock";
 import { LiveSyncCommands } from "./LiveSyncCommands";
 import { stripAllPrefixes } from "./lib/src/path";
@@ -35,14 +35,6 @@ function deserialize<T>(str: string, def: T) {
 export const pluginList = writable([] as PluginDataExDisplay[]);
 export const pluginIsEnumerating = writable(false);
 
-const encoder = new TextEncoder();
-const hashString = (async (key: string) => {
-    // const buff = writeString(key);
-    const buff = encoder.encode(key);
-    const digest = await crypto.subtle.digest('SHA-256', buff);
-    return uint8ArrayToHexString(new Uint8Array(digest));
-})
-
 export type PluginDataExFile = {
     filename: string,
     data?: string[],
@@ -209,7 +201,7 @@ export class ConfigSync extends LiveSyncCommands {
                                     for (const file of data.files) {
                                         const work = { ...file };
                                         const tempStr = getDocData(work.data);
-                                        work.data = [await hashString(tempStr)];
+                                        work.data = [crc32CKHash(tempStr)];
                                         xFiles.push(work);
                                     }
                                     entries.push({
diff --git a/src/CmdHiddenFileSync.ts b/src/CmdHiddenFileSync.ts
index 7990eca..3c33f5d 100644
--- a/src/CmdHiddenFileSync.ts
+++ b/src/CmdHiddenFileSync.ts
@@ -1,6 +1,6 @@
-import { Notice, normalizePath, PluginManifest } from "./deps";
-import { EntryDoc, LoadedEntry, LOG_LEVEL, InternalFileEntry, FilePathWithPrefix, FilePath } from "./lib/src/types";
-import { InternalFileInfo, ICHeader, ICHeaderEnd } from "./types";
+import { Notice, normalizePath, type PluginManifest } from "./deps";
+import { type EntryDoc, type LoadedEntry, LOG_LEVEL, type InternalFileEntry, type FilePathWithPrefix, type FilePath } from "./lib/src/types";
+import { type InternalFileInfo, ICHeader, ICHeaderEnd } from "./types";
 import { Parallels, delay, isDocContentSame } from "./lib/src/utils";
 import { Logger } from "./lib/src/logger";
 import { PouchDB } from "./lib/src/pouchdb-browser.js";
diff --git a/src/ObsidianLiveSyncSettingTab.ts b/src/ObsidianLiveSyncSettingTab.ts
index e0ec045..d8bd679 100644
--- a/src/ObsidianLiveSyncSettingTab.ts
+++ b/src/ObsidianLiveSyncSettingTab.ts
@@ -1,5 +1,5 @@
 import { App, PluginSettingTab, Setting, sanitizeHTMLToDom, TextAreaComponent, MarkdownRenderer, stringifyYaml } from "./deps";
-import { DEFAULT_SETTINGS, LOG_LEVEL, type ObsidianLiveSyncSettings, type ConfigPassphraseStore, type RemoteDBSettings, type FilePathWithPrefix, type DocumentID } from "./lib/src/types";
+import { DEFAULT_SETTINGS, LOG_LEVEL, type ObsidianLiveSyncSettings, type ConfigPassphraseStore, type RemoteDBSettings, type FilePathWithPrefix, type HashAlgorithm, type DocumentID } from "./lib/src/types";
 import { delay } from "./lib/src/utils";
 import { Semaphore } from "./lib/src/semaphore";
 import { versionNumberString2Number } from "./lib/src/strbin";
@@ -7,8 +7,7 @@ import { Logger } from "./lib/src/logger";
 import { checkSyncInfo, isCloudantURI } from "./lib/src/utils_couchdb.js";
 import { testCrypt } from "./lib/src/e2ee_v2";
 import ObsidianLiveSyncPlugin from "./main";
-import { balanceChunks, isChunk, localDatabaseCleanUp, performRebuildDB, remoteDatabaseCleanup, requestToCouchDB } from "./utils";
-import { stripAllPrefixes } from "./lib/src/path";
+import { balanceChunks, localDatabaseCleanUp, performRebuildDB, remoteDatabaseCleanup, requestToCouchDB } from "./utils";
 
 
 export class ObsidianLiveSyncSettingTab extends PluginSettingTab {
@@ -1716,6 +1715,22 @@ ${stringifyYaml(pluginConfig)}`;
                         await this.plugin.initializeDatabase();
                     })
             })
+
+        new Setting(containerHatchEl)
+            .setName("The Hash algorithm for chunk IDs")
+            .setDesc("xxhash64 is the current default.")
+            .setClass("wizardHidden")
+            .addDropdown((dropdown) =>
+                dropdown
+                    .addOptions({ "": "Old Algorithm", "xxhash32": "xxhash32 (Fast)", "xxhash64": "xxhash64 (Fastest)" } as Record<HashAlgorithm, string>)
+                    .setValue(this.plugin.settings.hashAlg)
+                    .onChange(async (value: HashAlgorithm) => {
+                        this.plugin.settings.hashAlg = value;
+                        await this.plugin.saveSettings();
+                    })
+            )
+            .setClass("wizardHidden");
+
         addScreenElement("50", containerHatchEl);
 
 
diff --git a/src/lib b/src/lib
index 63fa007..250f63e 160000
--- a/src/lib
+++ b/src/lib
@@ -1 +1 @@
-Subproject commit 63fa0074fe5bf2d45e9132885040ffbebade8e09
+Subproject commit 250f63eb48926d7b8168a594b6cbb7961fbee95e
diff --git a/tsconfig.json b/tsconfig.json
index 79bca56..a7369d6 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -21,7 +21,8 @@
             "ES5",
             "ES6",
             "ES7",
-            "es2019.array"
+            "es2019.array",
+            "ES2020.BigInt",
         ]
     },
     "include": [