Premature Optimization Quotes

Premature optimization is the root of all evil.

Premature optimization is the root of all evil.

If you don't know yourself, you may easily blow away opportunities meant for your success! Know who you are made of and save your dreams from premature death!

Paul Graham, computer scientist and cofounder of Y Combinator—the start-up funder of Airbnb, Dropbox, Stripe, and Twitch—encapsulated Ibarra’s tenets in a high school graduation speech he wrote, but never delivered: It might seem that nothing would be easier than deciding what you like, but it turns out to be hard, partly because it’s hard to get an accurate picture of most jobs. . . . Most of the work I’ve done in the last ten years didn’t exist when I was in high school. . . . In such a world it’s not a good idea to have fixed plans. And yet every May, speakers all over the country fire up the Standard Graduation Speech, the theme of which is: don’t give up on your dreams. I know what they mean, but this is a bad way to put it, because it implies you’re supposed to be bound by some plan you made early on. The computer world has a name for this: premature optimization. . . . . . . Instead of working back from a goal, work forward from promising situations. This is what most successful people actually do anyway. In the graduation-speech approach, you decide where you want to be in twenty years, and then ask: what should I do now to get there? I propose instead that you don’t commit to anything in the future, but just look at the options available now, and choose those that will give you the most promising range of options afterward.

A lot of business owners spend time solving problems they don’t have. Rob Walling refers to this as premature optimization. Examples include: 1. Getting a flawless credit card payment process setup before they have customers. 2. Optimizing their website before they have traffic. 3. Hiring staff before they have work for them. 4. Investing in the best systems before they have enough work to warrant it. Normally these decisions stem from believing that when you have a problem, you won’t be able to resolve it quickly.

Got Milk? For the record, you shouldn’t. I am not advocating for training your gut to handle lactose. We learned about the effect of animal protein and saturated fat on the gut in Chapter 2—less SCFA-producing bacteria, more inflammatory bacteria, increased TMAO production, increased intestinal permeability, and increases in bacterial endotoxin. As we’ve done in the past, when we examine the whole food rather than a sum of its parts, we find that dairy products have been associated with prostate cancer and Parkinson’s disease. Also the link to bone health turns out to be a myth—a prospective study of ninety-six thousand people over twenty-two years showed that milk consumption during teenage years did not protect against hip fracture later in life. In fact, men who drank more milk as a teenager actually had increased risk of hip fracture in the study. In a study of women in Sweden, high milk intake was associated with increased risk of bone fracture, heart disease, cancer, and premature death. One of the first things I do with my patients who have gas, bloating, or diarrhea is to eliminate dairy. You would not believe how many of them are cured just by doing this. Sorry, but milk doesn’t do a body good. The irony is that lactose, which has been vilified through the years as evil, is probably the most redeeming thing about dairy because lactose is actually a prebiotic and can have a beneficial effect on the gut microbiota.

Conversely, we humans are born premature and highly dependent newborns whose brains are shaped through years of interactions with our caretakers and the environment.

premature optimization is the root of all evil. —Donald E. Knuth [

Rushing to optimize before the bottlenecks are known may be the only error to have ruined more designs than feature creep. From tortured code to incomprehensible data layouts, the results of obsessing about speed or memory or disk usage at the expense of transparency and simplicity are everywhere. They spawn innumerable bugs and cost millions of man-hours—often, just to get marginal gains in the use of some resource much less expensive than debugging time. Disturbingly often, premature local optimization actually hinders global optimization (and hence reduces overall performance). A prematurely optimized portion of a design frequently interferes with changes that would have much higher payoffs across the whole design, so you end up with both inferior performance and excessively complex code.

There is overwhelming evidence that obesity increases risks of heart disease and diabetes, frequently leading to premature death. It would be quite fantastic to suggest that everyone is choosing the right diet, or a diet that is preferable to what might be produced with a few nudges. Of course, sensible people care about the taste of food, not simply about health, and eating is a source of pleasure in and of itself. We do not claim that everyone who is overweight is necessarily failing to act rationally, but we do reject the claim that all or almost all Americans are choosing their diet optimally.

We should forget about small efficiencies, say about 97% of the time: premature optimization is the root of all evil. Yet we should not pass up our opportunities in that critical 3%.

As the data is shared, tests influence each other. People get confused very quickly. This is a premature optimization. Write tests to be data agnostic.

It might seem that nothing would be easier than deciding what you like, but it turns out to be hard, partly because it’s hard to get an accurate picture of most jobs. . . . Most of the work I’ve done in the last ten years didn’t exist when I was in high school. . . . In such a world it’s not a good idea to have fixed plans. And yet every May, speakers all over the country fire up the Standard Graduation Speech, the theme of which is: don’t give up on your dreams. I know what they mean, but this is a bad way to put it, because it implies you’re supposed to be bound by some plan you made early on. The computer world has a name for this: premature optimization. . . . . . . Instead of working back from a goal, work forward from promising situations. This is what most successful people actually do anyway. In the graduation-speech approach, you decide where you want to be in twenty years, and then ask: what should I do now to get there? I propose instead that you don’t commit to anything in the future, but just look at the options available now, and choose those that will give you the most promising range of options afterward.

building for scale that you don’t need is wasted effort and may lock you into an inflexible design. In effect, it is a form of premature optimization.

The real problem is that programmers have spent far too much time worrying about efficiency in the wrong places and at the wrong times; premature optimization is the root of all evil (or at least most of it) in programming.

The PLT helped us to understand what our programming instructions were doing along the essential axis of speed and showed us precisely when and where we were introducing slowness to our source code. The PLT told us when to pay attention to the “small efficiencies” Knuth mentioned. It was our 3 percent escape hatch, a way to know for sure that optimization wasn’t “premature.” We were sure each optimization we did was helping to keep performance heading in the right direction.

For software developers who take their work seriously, Knuth is the consummate craftsman. Here’s what he has to say about optimization: Programmers waste enormous amounts of time thinking about, or worrying about, the speed of noncritical parts of their programs, and these attempts at efficiency actually have a strong negative impact when debugging and maintenance are considered. We should forget about small efficiencies, say about 97% of the time: premature optimization is the root of all evil.2 (Emphasis added.)

premature optimization, where you tweak or perfect code or algorithms (optimize) too early (prematurely).

To avoid mental traps, you must think more objectively. Try arguing from first principles, getting to root causes, and seeking out the third story. Realize that your intuitive interpretations of the world can often be wrong due to availability bias, fundamental attribution error, optimistic probability bias, and other related mental models that explain common errors in thinking. Use Ockham’s razor and Hanlon’s razor to begin investigating the simplest objective explanations. Then test your theories by de-risking your assumptions, avoiding premature optimization. Attempt to think gray in an effort to consistently avoid confirmation bias. Actively seek out other perspectives by including the Devil’s advocate position and bypassing the filter bubble. Consider the adage “You are what you eat.” You need to take in a variety of foods to be a healthy person. Likewise, taking in a variety of perspectives will help you become a super thinker.

Having a waist circumference of more than 40 inches in men and 35 inches in women doubled the risk of premature death, compared with having a waist circumference of less than 33 inches in men and 27 inches in women.

It’s usually a bad bet in software development to prematurely optimize and it’s also usually a bad bet in life.

Why Regularly Checking Your Oil Level Using an Oil Level Gauge is Crucial for Engine Health Your vehicle’s engine is a complex system with numerous moving parts, each working in unison to ensure optimal performance. However, like any machine, it requires proper maintenance to avoid wear and tear. One of the simplest yet most important maintenance tasks you can perform is regularly checking your engine’s oil level. Using an oil level gauge to monitor oil levels is a simple process, but it plays a crucial role in the overall health and longevity of your engine. The Role of Engine Oil Engine oil serves multiple vital functions. It lubricates the engine's moving parts, reducing friction, preventing wear and tear, and ensuring smooth operation. In addition to lubrication, oil also helps cool the engine by dissipating heat and filtering out harmful contaminants. Over time, the oil absorbs dirt, metal particles, and other debris from the engine, helping to keep everything clean and running efficiently. Regularly checking the oil level ensures that there’s enough oil to perform these critical functions. Lubrication: The Heart of Engine Function One of the primary functions of engine oil is lubrication. Moving parts inside the engine, such as pistons, camshafts, and crankshafts, generate substantial friction as they move at high speeds. Without proper lubrication, these parts can grind against each other, leading to significant damage. When oil levels are low, friction increases, and the engine parts are at a higher risk of wearing out prematurely. By checking your oil regularly using the oil level gauge, you can ensure that there is enough oil to keep the engine parts well-lubricated, preventing unnecessary damage. Preventing Overheating An often overlooked aspect of oil is its role in cooling the engine. As the engine operates, it generates heat, and oil helps absorb and transfer this heat away from the engine components. Without adequate oil, the engine can overheat, causing severe damage. Overheating can lead to warped components, blown gaskets, or even a seized engine. By regularly monitoring oil levels, you can prevent overheating and avoid costly repairs. Contaminant Removal In addition to lubrication and cooling, engine oil helps remove contaminants that accumulate in the engine. As oil circulates through the engine, it traps particles of dirt, metal shavings, and other debris, preventing them from circulating through the engine and causing damage. However, when oil levels drop too low, there is less oil to carry out this function. Contaminants may build up, which can lead to clogged oil filters or, in extreme cases, engine damage. Regular oil checks ensure that the oil remains at the proper level, so it can effectively remove harmful contaminants. Preventing Expensive Repairs Low oil levels can cause a range of engine problems, from poor performance and reduced fuel efficiency to catastrophic engine failure. By checking your oil level with the oil level gauge on a regular basis, you can catch low oil levels early and top up before any damage occurs. Ignoring this task may result in serious engine issues, which can lead to expensive repairs or even the need for an entire engine replacement. A simple check could save you hundreds, if not thousands, of dollars in repair costs. Prolonging Engine Life Engines are designed to last for many years with proper care. By regularly checking your oil level and keeping it topped up, you are ensuring that the engine continues to function as intended for a longer period. Proper maintenance, including oil checks, reduces the likelihood of early wear and tear, helping your engine run smoothly for miles to come. Conclusion Regularly checking your oil level using the oil level gauge is a simple yet effective way to maintain the health of your engine.

We should forget about small efficiencies, say about 97% of the time: premature optimization is the root of all evil.

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