With angular-nvd3 directives, since many configuration parameters are attributes, this can be a bit slower, since angular will keep track of any changes in any of the directive's attributes. Another argument is that the directives file is larger (un-minified 115kb).
I prefer "angular -nvd3" because json options can be created as a service and are configured and accessible much faster. Also, working in angular-highcharts is the best way to have a chart directive. It is also smaller (u-nminified 29.1kb)
dtseng
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