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maxbeatty/b.js

Created March 5, 2017 18:47
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AWS Lambda module caching anti-pattern
Raw
b.js
var first = true;
module.exports = function () {
console.log(`first: ${first}`);
if (first) {
first = false;
}
};
Raw
index.js
const b = require('./b');
exports.handle = function handle(event, context, callback) {
var i = 0;
while (i++ < 4) {
b();
}
callback();
};
Raw
logs-simplified.log
/aws/lambda/module-cache-test START RUN 1
/aws/lambda/module-cache-test 2017-03-05T18:36:51.853Z first: true
/aws/lambda/module-cache-test 2017-03-05T18:36:51.854Z first: false
/aws/lambda/module-cache-test 2017-03-05T18:36:51.854Z first: false
/aws/lambda/module-cache-test 2017-03-05T18:36:51.854Z first: false
/aws/lambda/module-cache-test END
/aws/lambda/module-cache-test START RUN 2
/aws/lambda/module-cache-test 2017-03-05T18:37:39.899Z first: false
/aws/lambda/module-cache-test 2017-03-05T18:37:39.899Z first: false
/aws/lambda/module-cache-test 2017-03-05T18:37:39.899Z first: false
/aws/lambda/module-cache-test 2017-03-05T18:37:39.899Z first: false
/aws/lambda/module-cache-test END
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