string indexOf vs for loop (v5)

Revision 5 of this benchmark created on

Setup

var str = "## MailCore 2: Introduction ##MailCore 2 provides a simple and asynchronous Objective-C API to work with the e-mail protocols **IMAP**, **POP** and **SMTP**. The API has been redesigned from the ground up.  It features:- **POP**, **IMAP** and **SMTP** support- **[RFC822](http://www.ietf.org/rfc/rfc0822.txt)** parser and generator- **Asynchronous** APIs- **HTML** rendering of messages- **iOS** and **Mac** support[![Build Status](https://travis-ci.org/MailCore/mailcore2.png?branch=master)](https://travis-ci.org/MailCore/mailcore2)## Installation ##### Build for iOS/OSX ###Read [instructions for iOS/OSX](https://github.com/MailCore/mailcore2/blob/master/build-mac/README.md).### Build for Windows ###Read [instructions for Windows](https://github.com/MailCore/mailcore2/blob/master/build-windows/README.md).### Build for Linux ###Read [instructions for Linux](https://github.com/MailCore/mailcore2/blob/master/build-linux/README.md).## Basic IMAP Usage ##Using MailCore 2 is just a little more complex conceptually than the original MailCore.  All fetch requests in MailCore 2 are made asynchronously through a queue.  What does this mean?  Well, let's  take a look at a simple example:```objc    MCOIMAPSession *session = [[MCOIMAPSession alloc] init];    [session setHostname:@imap.gmail.com];    [session setPort:993];    [session setUsername:@ADDRESS@gmail.com];    [session setPassword:@123456];    [session setConnectionType:MCOConnectionTypeTLS];    MCOIMAPMessagesRequestKind requestKind = MCOIMAPMessagesRequestKindHeaders;    NSString *folder = @INBOX;    MCOIndexSet *uids = [MCOIndexSet indexSetWithRange:MCORangeMake(1, UINT64_MAX)];    MCOIMAPFetchMessagesOperation *fetchOperation = [session fetchMessagesByUIDOperationWithFolder:folder requestKind:requestKind uids:uids];    [fetchOperation start:^(NSError * error, NSArray * fetchedMessages, MCOIndexSet * vanishedMessages) {        //We've finished downloading the messages!        //Let's check if there was an error:        if(error) {            NSLog(@Error downloading message headers:%@, error);        }        //And, let's print out the messages...        NSLog(@The post man delivereth:%@, fetchedMessages);    }];```In this sample, we retrieved and printed a list of email headers from an IMAP server.  In order to execute the fetch, we request an asynchronous operation object from the `MCOIMAPSession` instance with our parameters (more on this later).  This operation object is able to initiate a connection to Gmail when we call the `start` method.  Now here's where things get a little tricky.  We call the `start` function with an Objective-C block, which is executed on the main thread when the fetch operation completes.  The actual fetching from IMAP is done on a **background thread**, leaving your UI and other processing **free to use the main thread**.## Documentation ##* [Class documentation](http://libmailcore.com/mailcore2/api/index.html)* [Wiki](https://github.com/MailCore/mailcore2/wiki)## License ##MailCore 2 is BSD-Licensed.";

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Testing in
TestOps/sec
indexOf
var index = str.indexOf("downloading");
ready
for() loop
var index = -1;
var needle = "downloading";
for (var i = 0, l = str.length; i < l; i++) {
  if (str.substring(i, needle.length) == needle) {
    index = i;
    break;
  }
}
ready

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