使用AWS SDK for JavaScript中的CloudWatch Logs服务API，通过调用describeLogStreams和getLogEvents函数来获取最新的日志事件，以解决Lambda函数日志延迟的问题。以下是示例代码：

const AWS = require('aws-sdk');
const cloudwatchlogs = new AWS.CloudWatchLogs();

exports.handler = async (event, context) => {
  const logGroupName = '/aws/lambda/your-function-name';
  
  // Get latest log stream from the log group
  const streamResp = await cloudwatchlogs.describeLogStreams({
    logGroupName,
    descending: true,
    orderBy: 'LastEventTime',
    limit: 1
  }).promise();
  
  const { logStreamName } = streamResp.logStreams[0];
  
  // Get latest log events from the log stream
  const eventResp = await cloudwatchlogs.getLogEvents({
    logGroupName,
    logStreamName,
    startFromHead: true
  }).promise();
  
  // Process log events
  eventResp.events.forEach(event => {
    console.log(event.message);
  });
};