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Smooth chat streaming output #510

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Smooth chat streaming output #510

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94392ea
smooth the chat outputs
guolinke Dec 23, 2023
d8ddb2f
code clean
guolinke Dec 23, 2023
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42 changes: 34 additions & 8 deletions src/hooks/useSubmit.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -100,7 +100,34 @@ const useSubmit = () => {
);
}

if (stream) {
let messageQueue = [];
let streamProcessingCompleted = false;
async function processMessageQueue() {
while (!streamProcessingCompleted || messageQueue.length > 0) {
if (messageQueue.length > 0) {
let messageContent = messageQueue.shift();
const messageLen = messageContent.length;
let curChars = '';
let speed = streamProcessingCompleted
? messageLen
: Math.max(3, Math.round(messageLen / 30));
while (messageContent) {
curChars = messageContent.slice(0, speed);
const updatedChats = JSON.parse(
JSON.stringify(useStore.getState().chats)
);
const updatedMessages = updatedChats[currentChatIndex].messages;
updatedMessages[updatedMessages.length - 1].content += curChars;
setChats(updatedChats);
messageContent = messageContent.slice(speed);
await new Promise((resolve) => setTimeout(resolve, 50));
}
} else {
await new Promise((resolve) => setTimeout(resolve, 50));
}
}
}
async function readStream(stream) {
if (stream.locked)
throw new Error(
'Oops, the stream is locked right now. Please try again'
Expand All @@ -127,13 +154,7 @@ const useSubmit = () => {
}
return output;
}, '');

const updatedChats: ChatInterface[] = JSON.parse(
JSON.stringify(useStore.getState().chats)
);
const updatedMessages = updatedChats[currentChatIndex].messages;
updatedMessages[updatedMessages.length - 1].content += resultString;
setChats(updatedChats);
messageQueue.push(resultString);
}
}
if (useStore.getState().generating) {
Expand All @@ -143,6 +164,11 @@ const useSubmit = () => {
}
reader.releaseLock();
stream.cancel();
streamProcessingCompleted = true;
}

if (stream) {
await Promise.all([readStream(stream), processMessageQueue()]);
}

// update tokens used in chatting
Expand Down