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Run results for:
Object camelCase conversion test
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<iframe src="https://measurethat.net/Embed?id=601989" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36
Browser:
Chrome 135
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Arrays
115K/s
Objects
23K/s
View exact numbers
Test name
Executions per second
✓
Arrays
114,938 Ops/sec
Objects
22,724 Ops/sec
HTML Preparation code:
<!--your preparation HTML code goes here-->
Script Preparation code:
function snakeToCamel(str) { return str.replace(/(?!^)_(.)/g, (_, char) => char.toUpperCase()); } function objKeysToCamelCase(obj) { return Object.fromEntries(Object.entries(obj).map(([key, value]) => [snakeToCamel(key), value])) } const cache = new Map(); function objKeysToCamelCaseCached(obj) { const entries = Object.entries(obj).map(([key, value]) => { const cachedKey = cache.get(key); if (cachedKey) { newKey = cachedKey; } else { newKey = snakeToCamel(key); cache.set(key, newKey); } return [newKey, value]; }); return Object.fromEntries(entries); } const columns = ["firstName", "lastName", "jobTitle", "jobType", "sex", "ip"]; function createObjFromColumns(columns, values) { return Object.fromEntries(columns.map((column, index) => [column, values[index]])) } class User { constructor(firstName, lastName, jobTitle, jobType, sex, ip) { this.firstName = firstName; this.lastName = lastName; this.jobTitle = jobTitle; this.jobType = jobType; this.sex = sex; this.ip = ip; } } function createObjFromValues(values) { return new User(...values) } const dataObj = [{ "first_name": "Pedro", "last_name": "Heaney", "job_title": "Senior Intranet Officer", "job_type": "Specialist", "sex": "female", "ip": "183.166.63.121" }, { "first_name": "Domingo", "last_name": "Morissette", "job_title": "Regional Solutions Liaison", "job_type": "Executive", "sex": "female", "ip": "74.138.114.186" }, { "first_name": "Jammie", "last_name": "Steuber", "job_title": "Human Quality Coordinator", "job_type": "Agent", "sex": "female", "ip": "246.201.18.70" }, { "first_name": "Beverly", "last_name": "Price", "job_title": "Legacy Creative Coordinator", "job_type": "Producer", "sex": "female", "ip": "118.47.49.154" }, { "first_name": "Kathryn", "last_name": "Hayes-Sanford", "job_title": "Product Tactics Supervisor", "job_type": "Consultant", "sex": "male", "ip": "122.157.72.181" }, { "first_name": "Caterina", "last_name": "Walter", "job_title": "Senior Integration Manager", "job_type": "Assistant", "sex": "female", "ip": "118.193.86.90" }, { "first_name": "Beaulah", "last_name": "Hirthe", "job_title": "Corporate Group Agent", "job_type": "Supervisor", "sex": "female", "ip": "141.95.14.30" }, { "first_name": "Jennyfer", "last_name": "Schamberger", "job_title": "Internal Research Supervisor", "job_type": "Designer", "sex": "female", "ip": "125.191.241.202" }, { "first_name": "Dashawn", "last_name": "Lubowitz", "job_title": "Internal Directives Coordinator", "job_type": "Developer", "sex": "female", "ip": "13.4.43.29" }, { "first_name": "Deven", "last_name": "Franecki", "job_title": "Investor Tactics Analyst", "job_type": "Analyst", "sex": "male", "ip": "80.135.70.239" }, { "first_name": "Verna", "last_name": "Witting", "job_title": "National Identity Administrator", "job_type": "Strategist", "sex": "male", "ip": "89.31.73.192" }, { "first_name": "Beverly", "last_name": "Zieme", "job_title": "Internal Assurance Liaison", "job_type": "Director", "sex": "female", "ip": "44.223.7.248" }, { "first_name": "Lynn", "last_name": "Legros", "job_title": "Senior Research Architect", "job_type": "Liaison", "sex": "female", "ip": "210.59.97.220" }, { "first_name": "Roscoe", "last_name": "Breitenberg", "job_title": "Lead Usability Facilitator", "job_type": "Technician", "sex": "male", "ip": "251.191.56.168" }, { "first_name": "Janessa", "last_name": "Mann", "job_title": "Customer Response Executive", "job_type": "Administrator", "sex": "male", "ip": "249.114.54.13" }, { "first_name": "Gabrielle", "last_name": "Gerlach", "job_title": "District Operations Producer", "job_type": "Liaison", "sex": "female", "ip": "135.222.197.158" }, { "first_name": "Amina", "last_name": "Farrell", "job_title": "Direct Tactics Director", "job_type": "Agent", "sex": "male", "ip": "25.249.119.95" }, { "first_name": "Kelly", "last_name": "Langosh", "job_title": "Product Factors Consultant", "job_type": "Director", "sex": "female", "ip": "248.137.14.38" }, { "first_name": "Darrin", "last_name": "Feeney", "job_title": "Central Intranet Coordinator", "job_type": "Producer", "sex": "female", "ip": "122.29.87.2" }, { "first_name": "Durward", "last_name": "Schowalter", "job_title": "Human Accounts Facilitator", "job_type": "Supervisor", "sex": "male", "ip": "24.240.169.7" }, { "first_name": "Junior", "last_name": "Rice", "job_title": "Direct Factors Administrator", "job_type": "Agent", "sex": "female", "ip": "228.55.135.81" }, { "first_name": "Triston", "last_name": "Koepp", "job_title": "Investor Intranet Associate", "job_type": "Architect", "sex": "female", "ip": "130.34.36.173" }, { "first_name": "Hilario", "last_name": "Jacobi", "job_title": "District Response Analyst", "job_type": "Assistant", "sex": "female", "ip": "222.209.166.146" }, { "first_name": "Aiden", "last_name": "Rowe", "job_title": "Dynamic Web Specialist", "job_type": "Designer", "sex": "male", "ip": "130.117.131.39" }, { "first_name": "Titus", "last_name": "Vandervort", "job_title": "International Interactions Liaison", "job_type": "Facilitator", "sex": "female", "ip": "142.241.239.23" }, { "first_name": "Kole", "last_name": "Douglas", "job_title": "Corporate Functionality Officer", "job_type": "Assistant", "sex": "male", "ip": "0.251.249.142" }, { "first_name": "Oral", "last_name": "Durgan", "job_title": "Legacy Factors Associate", "job_type": "Technician", "sex": "male", "ip": "95.9.35.12" }, { "first_name": "Marilou", "last_name": "Parisian", "job_title": "Principal Configuration Producer", "job_type": "Specialist", "sex": "male", "ip": "103.48.32.68" }, { "first_name": "Marcella", "last_name": "Reynolds", "job_title": "Legacy Optimization Coordinator", "job_type": "Analyst", "sex": "male", "ip": "211.224.113.10" }, { "first_name": "Kayla", "last_name": "Wehner", "job_title": "Principal Intranet Supervisor", "job_type": "Technician", "sex": "male", "ip": "103.106.36.197" }, { "first_name": "Albina", "last_name": "Lakin-Mohr", "job_title": "National Branding Officer", "job_type": "Orchestrator", "sex": "male", "ip": "118.192.12.224" }, { "first_name": "Otis", "last_name": "Ratke", "job_title": "Internal Configuration Engineer", "job_type": "Designer", "sex": "female", "ip": "171.94.245.95" }, { "first_name": "Rebecca", "last_name": "Kerluke", "job_title": "Principal Configuration Officer", "job_type": "Officer", "sex": "male", "ip": "219.3.153.26" }, { "first_name": "Gaston", "last_name": "Schmitt", "job_title": "Dynamic Solutions Manager", "job_type": "Consultant", "sex": "male", "ip": "242.26.243.223" }, { "first_name": "Keely", "last_name": "Rippin", "job_title": "Customer Markets Associate", "job_type": "Officer", "sex": "female", "ip": "139.100.249.29" }, { "first_name": "Jabari", "last_name": "Roob", "job_title": "Chief Tactics Liaison", "job_type": "Orchestrator", "sex": "female", "ip": "66.236.109.152" }, { "first_name": "Esta", "last_name": "Krajcik", "job_title": "Regional Implementation Consultant", "job_type": "Designer", "sex": "male", "ip": "149.201.144.125" }, { "first_name": "Kaci", "last_name": "Jenkins", "job_title": "Direct Configuration Engineer", "job_type": "Director", "sex": "female", "ip": "63.4.3.154" }, { "first_name": "Jerrell", "last_name": "Corwin", "job_title": "Direct Program Officer", "job_type": "Producer", "sex": "male", "ip": "227.222.114.140" }, { "first_name": "Carey", "last_name": "Wolf", "job_title": "National Metrics Associate", "job_type": "Manager", "sex": "male", "ip": "64.141.1.229" }, { "first_name": "Emelie", "last_name": "Price", "job_title": "Dynamic Optimization Orchestrator", "job_type": "Supervisor", "sex": "female", "ip": "137.54.159.130" }, { "first_name": "Demetrius", "last_name": "Prohaska", "job_title": "Investor Usability Representative", "job_type": "Manager", "sex": "female", "ip": "185.24.161.238" }, { "first_name": "Henderson", "last_name": "Koch-Paucek", "job_title": "Customer Communications Architect", "job_type": "Technician", "sex": "female", "ip": "246.28.199.148" }, { "first_name": "Aliza", "last_name": "Donnelly", "job_title": "Legacy Group Developer", "job_type": "Facilitator", "sex": "female", "ip": "227.160.180.161" }, { "first_name": "Leo", "last_name": "Considine", "job_title": "Forward Usability Representative", "job_type": "Supervisor", "sex": "male", "ip": "15.63.26.124" }, { "first_name": "Fernando", "last_name": "Shanahan", "job_title": "Global Communications Manager", "job_type": "Associate", "sex": "female", "ip": "14.251.175.43" }, { "first_name": "Hortense", "last_name": "Muller", "job_title": "Customer Communications Strategist", "job_type": "Planner", "sex": "female", "ip": "228.208.250.208" }, { "first_name": "Nicholaus", "last_name": "Little", "job_title": "Chief Division Director", "job_type": "Strategist", "sex": "male", "ip": "27.83.193.114" }, { "first_name": "Litzy", "last_name": "Langosh", "job_title": "Forward Data Planner", "job_type": "Supervisor", "sex": "female", "ip": "194.171.200.146" }, { "first_name": "Buddy", "last_name": "Quitzon", "job_title": "Customer Implementation Developer", "job_type": "Director", "sex": "male", "ip": "163.61.72.73" } ]; const dataArray = dataObj.map(item => Object.values(item));
Tests:
Objects
dataObj.map(obj => objKeysToCamelCase(obj));
Objects with cache
dataObj.map(obj => objKeysToCamelCaseCached(obj));
Arrays
dataArray.map(arr => createObjFromColumns(columns, arr));
Classes from arrays
dataArray.map(arr => createObjFromValues(arr));