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This one line of Javascript made FT.com 10 times slower
source link: https://medium.com/ft-product-technology/this-one-line-of-javascript-made-ft-com-10-times-slower-5afb02bfd93f
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It started off with an alert, telling us that the error rate for the Front Page application is above the 4% threshold. This had a real impact on our users, with thousands of error pages being shown…
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