2b:null 2c:["$","title",null,{"children":"Timing number coercion | Dominik Moritz | Observable"}] 31:[] 2f:{"id":"19727a442d74ca86","slug":"timing-number-coercion","title":"Timing number coercion","thumbnail":"e400e169e00407ceef4e313a06e85174763f172705f8b62c7e960615f6b40b4e","access_level":"public","create_time":"$D2018-07-19T22:27:57.427Z","update_time":"$D2018-07-19T22:59:51.665Z","view_time":null,"first_public_time":"$D2018-07-19T22:55:01.966Z","fork":false,"stars":1,"starred":false,"owner":{"type":"team","id":"448d844ff245547c","login":"domoritz","name":"Dominik Moritz","avatar_url":"https://avatars-next.observableusercontent.com/e528f496e8e47781dbdc92c47d89b1b19946a81d20c027823850f83467732c11","tier":"starter_2024"},"version":92,"publish_version":92,"role":null,"authored":false,"authors":[{"type":"individual","id":"2e169e421d94e0c5","login":"domoritz","name":"Dominik Moritz","avatar_url":"https://avatars-next.observableusercontent.com/e528f496e8e47781dbdc92c47d89b1b19946a81d20c027823850f83467732c11","tier":null}],"members":[{"type":"individual","id":"2e169e421d94e0c5","login":"domoritz","name":"Dominik Moritz","avatar_url":"https://avatars-next.observableusercontent.com/e528f496e8e47781dbdc92c47d89b1b19946a81d20c027823850f83467732c11","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"subscribed":null,"forks":0,"collection":null,"type":"notebook","body":{"title":"Timing number coercion","cells":[{"id":0,"value":"md`# Timing number coercion`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":13,"value":"viewof N = html``","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":90,"value":"viewof R = html``","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":30,"value":"md`\n| Summing ${d3.format(',')(N)} items | First | Second |\n|--------|------:|-----:|------:|\n| Numbers | ${tnumbers[0]} ms | ${tnumbers[1]} ms |\n| Numbers no Coerce | ${tnumbersNoCoerce[0]} ms | ${tnumbersNoCoerce[1]} ms |\n| Strings | ${tstrings[0]} ms | ${tstrings[1]} ms |\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":60,"value":"md`\nWhat if we have to run the conversion anyway?\n\n| Summing ${d3.format(',')(N)} items | Coecion / Copying | Summing ${R} times |\n|--------|------:|-----:|------:|\n| Numbers | ${tconvnumbers[0]} ms | ${tconvnumbers[1]} ms |\n| Strings | ${tconvstrings[0]} ms | ${tconvstrings[1]} ms |\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":4,"value":"numbers = d3.range(N)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":10,"value":"strings = d3.range(N).map(d => '' + d)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":17,"value":"time = function(arr) {\n const t0 = Date.now();\n let s = 0;\n for (const e of arr) {\n s += +e;\n }\n const t1 = Date.now();\n \n s = 0;\n for (const e of arr) {\n s += +e;\n }\n \n const t2 = Date.now();\n return [t1-t0, t2-t1, s];\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":73,"value":"timeNoCoerce = function(arr) {\n const t0 = Date.now();\n let s = 0;\n for (const e of arr) {\n s += e;\n }\n const t1 = Date.now();\n \n s = 0;\n for (const e of arr) {\n s += e;\n }\n \n const t2 = Date.now();\n return [t1-t0, t2-t1, s];\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":20,"value":"tnumbers = time(numbers)\n","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":75,"value":"tnumbersNoCoerce = timeNoCoerce(numbers)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":43,"value":"tstrings = time(strings)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":52,"value":"timeString = function(convert) {\n const temp = d3.range(N);\n \n const t0 = Date.now();\n \n \n if (convert) {\n // convert strings to numbers once\n for (let i = 0; i < N; i++) {\n temp[i] = +strings[i];\n }\n } else {\n for (let i = 0; i < N; i++) {\n temp[i] = strings[i];\n }\n }\n\n const t1 = Date.now();\n \n for (let i = 0; i < R; i++) {\n let s = 0;\n for (const e of temp) {\n s += +e;\n }\n }\n \n const t2 = Date.now();\n return [t1-t0, t2-t1];\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":64,"value":"tconvnumbers = timeString(true)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":66,"value":"tconvstrings = timeString(false)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":5,"value":"d3 = require('d3')","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"}],"files":"$W31","stdlib":"1","titling":"auto"}} 30:"$2f:body"