pub fn export_to_hgrm_gzip(histogram: &Histogram<u64>) -> Result<String> {
    let mut export: String = String::new();
    export.push_str(&format!(
        "{:>12} {:>OUTPUT_VALUE_UNIT_SCALING_RATIO$} {:>10} {:>14}\n\n",
        "Value",
        "Percentile",
        "TotalCount",
        "1/(1-Percentile)",
        OUTPUT_VALUE_UNIT_SCALING_RATIO = OUTPUT_VALUE_UNIT_SCALING_RATIO + 2 // + 2 from leading "0." for numbers
    ));
    let mut sum = 0;
    for v in histogram.iter_quantiles(PERCENTILE_TICKS_PER_HALF_DISTANCE) {
        sum += v.count_since_last_iteration();
        if v.quantile_iterated_to() < 1.0 {
            export.push_str(&format!(
                "{:12} {:1.*} {:10} {:14.2}\n",
                v.value_iterated_to(),
                OUTPUT_VALUE_UNIT_SCALING_RATIO,
                v.quantile_iterated_to(),
                sum,
                1_f64 / (1_f64 - v.quantile_iterated_to())
            ));
        } else {
            export.push_str(&format!(
                "{:12} {:1.*} {:10} {:>14}\n",
                v.value_iterated_to(),
                OUTPUT_VALUE_UNIT_SCALING_RATIO,
                v.quantile_iterated_to(),
                sum,
                "∞"
            ));
        }
    }

    fn format_extra_data<T1: Display, T2: Display>(
        label1: &str,
        data1: T1,
        label2: &str,
        data2: T2,
    ) -> String {
        format!(
            "#[{:10} = {:12.2}, {:14} = {:12.2}]\n",
            label1, data1, label2, data2
        )
    }

    export.push_str(&format_extra_data(
        "Mean",
        histogram.mean(),
        "StdDeviation",
        histogram.stdev(),
    ));
    export.push_str(&format_extra_data(
        "Max",
        histogram.max(),
        "Total count",
        histogram.len(),
    ));
    export.push_str(&format_extra_data(
        "Buckets",
        histogram.buckets(),
        "SubBuckets",
        histogram.distinct_values(),
    ));

    /*
     * Aesthetically, having a giant blob of escaped text in the output annoys me (which is silly,
     * I know, but it does). Let's clean that up a bit by compressing it and Base64 encoding it.
     */
    let export = {
        use std::io::Write;
        let mut zipper = flate2::write::GzEncoder::new(Vec::new(), flate2::Compression::default());
        zipper.write_all(export.as_bytes())?;
        let zipped_export: Vec<u8> = zipper.finish()?;
        base64::encode(&zipped_export)
    };

    Ok(export)
}
/// Output histogram data in a format similar to the Java impl's
/// `AbstractHistogram#outputPercentileDistribution`, but gzip'd and Base64-encoded.
Output histogram data in a format similar to the Java impl's
`AbstractHistogram#outputPercentileDistribution`, but gzip'd and Base64-encoded.
Output histogram data in a format similar to the Java impl ' s ` AbstractHistogram#outputPercentileDistribution ` but gzip ' d and Base64 - encoded .
pub fn export_to_hgrm_gzip(histogram: &Histogram<u64>) -> Result<String> {
    let mut export: String = String::new();
    export.push_str(&format!(
        "{:>12} {:>OUTPUT_VALUE_UNIT_SCALING_RATIO$} {:>10} {:>14}\n\n",
        "Value",
        "Percentile",
        "TotalCount",
        "1/(1-Percentile)",
        OUTPUT_VALUE_UNIT_SCALING_RATIO = OUTPUT_VALUE_UNIT_SCALING_RATIO + 2 // + 2 from leading "0." for numbers
    ));
    let mut sum = 0;
    for v in histogram.iter_quantiles(PERCENTILE_TICKS_PER_HALF_DISTANCE) {
        sum += v.count_since_last_iteration();
        if v.quantile_iterated_to() < 1.0 {
            export.push_str(&format!(
                "{:12} {:1.*} {:10} {:14.2}\n",
                v.value_iterated_to(),
                OUTPUT_VALUE_UNIT_SCALING_RATIO,
                v.quantile_iterated_to(),
                sum,
                1_f64 / (1_f64 - v.quantile_iterated_to())
            ));
        } else {
            export.push_str(&format!(
                "{:12} {:1.*} {:10} {:>14}\n",
                v.value_iterated_to(),
                OUTPUT_VALUE_UNIT_SCALING_RATIO,
                v.quantile_iterated_to(),
                sum,
                "∞"
            ));
        }
    }
    fn format_extra_data<T1: Display, T2: Display>(
        label1: &str,
        data1: T1,
        label2: &str,
        data2: T2,
    ) -> String {
        format!(
            "#[{:10} = {:12.2}, {:14} = {:12.2}]\n",
            label1, data1, label2, data2
        )
    }
    export.push_str(&format_extra_data(
        "Mean",
        histogram.mean(),
        "StdDeviation",
        histogram.stdev(),
    ));
    export.push_str(&format_extra_data(
        "Max",
        histogram.max(),
        "Total count",
        histogram.len(),
    ));
    export.push_str(&format_extra_data(
        "Buckets",
        histogram.buckets(),
        "SubBuckets",
        histogram.distinct_values(),
    ));
    /*
     * Aesthetically, having a giant blob of escaped text in the output annoys me (which is silly,
     * I know, but it does). Let's clean that up a bit by compressing it and Base64 encoding it.
     */
    let export = {
        use std::io::Write;
        let mut zipper = flate2::write::GzEncoder::new(Vec::new(), flate2::Compression::default());
        zipper.write_all(export.as_bytes())?;
        let zipped_export: Vec<u8> = zipper.finish()?;
        base64::encode(&zipped_export)
    };
    Ok(export)
}
pub fn export_to_hgrm_gzip ( histogram : & Histogram < u64 > ) -> Result < String > { let mut export : String = String :: new ( ) ; export . push_str ( & format ! ( " \n \n " " " " " " " " " OUTPUT_VALUE_UNIT_SCALING_RATIO OUTPUT_VALUE_UNIT_SCALING_RATIO 2 // + 2 from leading "0." for numbers ) ) ; let mut sum = 0 ; for v in histogram . iter_quantiles ( PERCENTILE_TICKS_PER_HALF_DISTANCE ) { sum += v . count_since_last_iteration ( ) ; if v . quantile_iterated_to ( ) < 1.0 { export . push_str ( & format ! ( " \n " v value_iterated_to ( ) OUTPUT_VALUE_UNIT_SCALING_RATIO v quantile_iterated_to ( ) sum 1_f64 ( 1_f64 v quantile_iterated_to ( ) ) ) ) ; } else { export . push_str ( & format ! ( " \n " v value_iterated_to ( ) OUTPUT_VALUE_UNIT_SCALING_RATIO v quantile_iterated_to ( ) sum " ) ) ; } } fn format_extra_data < T1 : Display , T2 : Display > ( label1 : & str , data1 : T1 , label2 : & str , data2 : T2 , ) -> String { format ! ( " \n " label1 data1 label2 data2 ) } export . push_str ( & format_extra_data ( " " , histogram . mean ( ) , " " , histogram . stdev ( ) , ) ) ; export . push_str ( & format_extra_data ( " " , histogram . max ( ) , " " , histogram . len ( ) , ) ) ; export . push_str ( & format_extra_data ( " " , histogram . buckets ( ) , " " , histogram . distinct_values ( ) , ) ) ; /*
     * Aesthetically, having a giant blob of escaped text in the output annoys me (which is silly,
     * I know, but it does). Let's clean that up a bit by compressing it and Base64 encoding it.
     */ let export = { use std :: io :: Write ; let mut zipper = flate2 :: write :: GzEncoder :: new ( Vec :: new ( ) , flate2 :: Compression :: default ( ) ) ; zipper . write_all ( export . as_bytes ( ) ) ? ; let zipped_export : Vec < u8 > = zipper . finish ( ) ? ; base64 :: encode ( & zipped_export ) } ; Ok ( export ) }
Output histogram data in a format similar to the Java impl's
`AbstractHistogram#outputPercentileDistribution`, but gzip'd and Base64-encoded.
Output histogram data in a format similar to the Java impl ' s ` AbstractHistogram#outputPercentileDistribution ` but gzip ' d and Base64 - encoded .
histogram
&Histogram<u64>
histogram
&Histogram<u64>